Partial derivative with respect to three variables












5















I just started learning LaTeX and I am facing problem in writing the following equation, can anyone please help me out?



enter image description here










share|improve this question





























    5















    I just started learning LaTeX and I am facing problem in writing the following equation, can anyone please help me out?



    enter image description here










    share|improve this question



























      5












      5








      5








      I just started learning LaTeX and I am facing problem in writing the following equation, can anyone please help me out?



      enter image description here










      share|improve this question
















      I just started learning LaTeX and I am facing problem in writing the following equation, can anyone please help me out?



      enter image description here







      symbols






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Feb 22 at 14:03









      Bernard

      174k776207




      174k776207










      asked Feb 22 at 13:41









      shadow khshadow kh

      1284




      1284






















          5 Answers
          5






          active

          oldest

          votes


















          8














          A simpler code with the diffcoeff package. The order of differentiation is automatically computed — I suppose k+l is k_1+k_2+l:



          documentclass{article}
          usepackage{mathtools, diffcoeff}
          DeclarePairedDelimiterabs{lvert}{rvert}

          begin{document}

          [
          abs*{diffp[k_1,k_2,l]{u_0}
          {x_1, x_2, t}} leq C
          ]

          end{document}


          enter image description here






          share|improve this answer
























          • I didn't know about diffcoeff. Nice. Off topic: k_1+k_2+l just to be compatible with order of powers in denominator? :-)

            – Sigur
            Feb 22 at 14:09











          • @Sigur: it is a comparatively recent package. For the question: yes it is so. Of course, I understand that probably, $k$ denotes $k_1+k_2$, but there doesn't seem to be tools to use k in the numerator and k_1, k_2 in the denominator.

            – Bernard
            Feb 22 at 14:15











          • Is there any way to eliminate the parentheses around the variables in the denominator? IMHO, adding parentheses like this creates ambiguity and is wrong. See i.stack.imgur.com/Jc3v8.png The powers k_1, k_2 and l should be applied to the whole partial <variable> thing.

            – Ruixi Zhang
            Feb 23 at 13:05













          • It seems to be hard-coded in the package for so-called long variables (it goes into the category, I suspect, because of the indices). As it's written in latex 3, which I don't master, I have no idea how to patch it, unfortunately. Maybe, ask a new question about this feature?

            – Bernard
            Feb 23 at 13:54



















          6














          You could write



          [leftlvertfrac{partial^{k+l}u_0}
          {{partial x_1}^{k_1}{partial x_2}^{k_2}partial t^l}rightrvert
          leq C]


          enter image description here






          share|improve this answer

































            5














            one more variation ...



            documentclass{article}
            usepackage{mathtools}
            DeclarePairedDelimiterabs{lvert}{rvert}

            begin{document}
            [
            abs*{frac{partial^{k+l}u_0}
            {partial x_1^{k_1}partial x_2^{k_2}partial t^l}} leq C
            ]
            end{document}


            enter image description here






            share|improve this answer
























            • How did you produce the frame around the image?

              – Sigur
              Feb 22 at 13:55











            • @Sigur, it is not part of latex code, but drawn by Snipping Tool, which i use for copping image from pdf previewer to site. in it i select option Show Ink selection ...

              – Zarko
              Feb 22 at 14:01











            • Ah, OK. I use Shutter. Maybe there is such frame option there.

              – Sigur
              Feb 22 at 14:02











            • Thanks to you I've just created a plugin for Shutter to add 1px solid blue frame around the image. Now I need to know how to run it automatically when screen shot is created.

              – Sigur
              Feb 22 at 15:03











            • For the frame around formula in LaTeX, simply use boxed{...} inside the math context. Of course, to get the wide white horizontal margin you would have to manually add some space with hspace or qquad

              – Jhor
              Feb 22 at 20:55





















            5














            Like this?



            enter image description here



            documentclass{report}
            usepackage{amsmath}

            begin{document}
            [ Bigglvert
            frac{partial^{k+l}u_0}
            {partial^{k_1}{x_1},
            partial^{k_2}{x_2},
            partial^{l}{t}}
            Biggrvert leq C,
            ]
            end{document}





            share|improve this answer





















            • 1





              The notation here is wrong I’m afraid. The k_1, k_2 and l should follow the variables, not the partial signs. See i.stack.imgur.com/Jc3v8.png

              – Ruixi Zhang
              Feb 23 at 13:04





















            1














            documentclass{article}

            begin{document}
            $ left | frac{partial^{k+1}u_0}{{partial x_1}^{k_1} {partial x_2}^{k_2} partial t^l} right | leq C $
            end{document}


            enter image description here






            share|improve this answer

























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              5 Answers
              5






              active

              oldest

              votes








              5 Answers
              5






              active

              oldest

              votes









              active

              oldest

              votes






              active

              oldest

              votes









              8














              A simpler code with the diffcoeff package. The order of differentiation is automatically computed — I suppose k+l is k_1+k_2+l:



              documentclass{article}
              usepackage{mathtools, diffcoeff}
              DeclarePairedDelimiterabs{lvert}{rvert}

              begin{document}

              [
              abs*{diffp[k_1,k_2,l]{u_0}
              {x_1, x_2, t}} leq C
              ]

              end{document}


              enter image description here






              share|improve this answer
























              • I didn't know about diffcoeff. Nice. Off topic: k_1+k_2+l just to be compatible with order of powers in denominator? :-)

                – Sigur
                Feb 22 at 14:09











              • @Sigur: it is a comparatively recent package. For the question: yes it is so. Of course, I understand that probably, $k$ denotes $k_1+k_2$, but there doesn't seem to be tools to use k in the numerator and k_1, k_2 in the denominator.

                – Bernard
                Feb 22 at 14:15











              • Is there any way to eliminate the parentheses around the variables in the denominator? IMHO, adding parentheses like this creates ambiguity and is wrong. See i.stack.imgur.com/Jc3v8.png The powers k_1, k_2 and l should be applied to the whole partial <variable> thing.

                – Ruixi Zhang
                Feb 23 at 13:05













              • It seems to be hard-coded in the package for so-called long variables (it goes into the category, I suspect, because of the indices). As it's written in latex 3, which I don't master, I have no idea how to patch it, unfortunately. Maybe, ask a new question about this feature?

                – Bernard
                Feb 23 at 13:54
















              8














              A simpler code with the diffcoeff package. The order of differentiation is automatically computed — I suppose k+l is k_1+k_2+l:



              documentclass{article}
              usepackage{mathtools, diffcoeff}
              DeclarePairedDelimiterabs{lvert}{rvert}

              begin{document}

              [
              abs*{diffp[k_1,k_2,l]{u_0}
              {x_1, x_2, t}} leq C
              ]

              end{document}


              enter image description here






              share|improve this answer
























              • I didn't know about diffcoeff. Nice. Off topic: k_1+k_2+l just to be compatible with order of powers in denominator? :-)

                – Sigur
                Feb 22 at 14:09











              • @Sigur: it is a comparatively recent package. For the question: yes it is so. Of course, I understand that probably, $k$ denotes $k_1+k_2$, but there doesn't seem to be tools to use k in the numerator and k_1, k_2 in the denominator.

                – Bernard
                Feb 22 at 14:15











              • Is there any way to eliminate the parentheses around the variables in the denominator? IMHO, adding parentheses like this creates ambiguity and is wrong. See i.stack.imgur.com/Jc3v8.png The powers k_1, k_2 and l should be applied to the whole partial <variable> thing.

                – Ruixi Zhang
                Feb 23 at 13:05













              • It seems to be hard-coded in the package for so-called long variables (it goes into the category, I suspect, because of the indices). As it's written in latex 3, which I don't master, I have no idea how to patch it, unfortunately. Maybe, ask a new question about this feature?

                – Bernard
                Feb 23 at 13:54














              8












              8








              8







              A simpler code with the diffcoeff package. The order of differentiation is automatically computed — I suppose k+l is k_1+k_2+l:



              documentclass{article}
              usepackage{mathtools, diffcoeff}
              DeclarePairedDelimiterabs{lvert}{rvert}

              begin{document}

              [
              abs*{diffp[k_1,k_2,l]{u_0}
              {x_1, x_2, t}} leq C
              ]

              end{document}


              enter image description here






              share|improve this answer













              A simpler code with the diffcoeff package. The order of differentiation is automatically computed — I suppose k+l is k_1+k_2+l:



              documentclass{article}
              usepackage{mathtools, diffcoeff}
              DeclarePairedDelimiterabs{lvert}{rvert}

              begin{document}

              [
              abs*{diffp[k_1,k_2,l]{u_0}
              {x_1, x_2, t}} leq C
              ]

              end{document}


              enter image description here







              share|improve this answer












              share|improve this answer



              share|improve this answer










              answered Feb 22 at 14:06









              BernardBernard

              174k776207




              174k776207













              • I didn't know about diffcoeff. Nice. Off topic: k_1+k_2+l just to be compatible with order of powers in denominator? :-)

                – Sigur
                Feb 22 at 14:09











              • @Sigur: it is a comparatively recent package. For the question: yes it is so. Of course, I understand that probably, $k$ denotes $k_1+k_2$, but there doesn't seem to be tools to use k in the numerator and k_1, k_2 in the denominator.

                – Bernard
                Feb 22 at 14:15











              • Is there any way to eliminate the parentheses around the variables in the denominator? IMHO, adding parentheses like this creates ambiguity and is wrong. See i.stack.imgur.com/Jc3v8.png The powers k_1, k_2 and l should be applied to the whole partial <variable> thing.

                – Ruixi Zhang
                Feb 23 at 13:05













              • It seems to be hard-coded in the package for so-called long variables (it goes into the category, I suspect, because of the indices). As it's written in latex 3, which I don't master, I have no idea how to patch it, unfortunately. Maybe, ask a new question about this feature?

                – Bernard
                Feb 23 at 13:54



















              • I didn't know about diffcoeff. Nice. Off topic: k_1+k_2+l just to be compatible with order of powers in denominator? :-)

                – Sigur
                Feb 22 at 14:09











              • @Sigur: it is a comparatively recent package. For the question: yes it is so. Of course, I understand that probably, $k$ denotes $k_1+k_2$, but there doesn't seem to be tools to use k in the numerator and k_1, k_2 in the denominator.

                – Bernard
                Feb 22 at 14:15











              • Is there any way to eliminate the parentheses around the variables in the denominator? IMHO, adding parentheses like this creates ambiguity and is wrong. See i.stack.imgur.com/Jc3v8.png The powers k_1, k_2 and l should be applied to the whole partial <variable> thing.

                – Ruixi Zhang
                Feb 23 at 13:05













              • It seems to be hard-coded in the package for so-called long variables (it goes into the category, I suspect, because of the indices). As it's written in latex 3, which I don't master, I have no idea how to patch it, unfortunately. Maybe, ask a new question about this feature?

                – Bernard
                Feb 23 at 13:54

















              I didn't know about diffcoeff. Nice. Off topic: k_1+k_2+l just to be compatible with order of powers in denominator? :-)

              – Sigur
              Feb 22 at 14:09





              I didn't know about diffcoeff. Nice. Off topic: k_1+k_2+l just to be compatible with order of powers in denominator? :-)

              – Sigur
              Feb 22 at 14:09













              @Sigur: it is a comparatively recent package. For the question: yes it is so. Of course, I understand that probably, $k$ denotes $k_1+k_2$, but there doesn't seem to be tools to use k in the numerator and k_1, k_2 in the denominator.

              – Bernard
              Feb 22 at 14:15





              @Sigur: it is a comparatively recent package. For the question: yes it is so. Of course, I understand that probably, $k$ denotes $k_1+k_2$, but there doesn't seem to be tools to use k in the numerator and k_1, k_2 in the denominator.

              – Bernard
              Feb 22 at 14:15













              Is there any way to eliminate the parentheses around the variables in the denominator? IMHO, adding parentheses like this creates ambiguity and is wrong. See i.stack.imgur.com/Jc3v8.png The powers k_1, k_2 and l should be applied to the whole partial <variable> thing.

              – Ruixi Zhang
              Feb 23 at 13:05







              Is there any way to eliminate the parentheses around the variables in the denominator? IMHO, adding parentheses like this creates ambiguity and is wrong. See i.stack.imgur.com/Jc3v8.png The powers k_1, k_2 and l should be applied to the whole partial <variable> thing.

              – Ruixi Zhang
              Feb 23 at 13:05















              It seems to be hard-coded in the package for so-called long variables (it goes into the category, I suspect, because of the indices). As it's written in latex 3, which I don't master, I have no idea how to patch it, unfortunately. Maybe, ask a new question about this feature?

              – Bernard
              Feb 23 at 13:54





              It seems to be hard-coded in the package for so-called long variables (it goes into the category, I suspect, because of the indices). As it's written in latex 3, which I don't master, I have no idea how to patch it, unfortunately. Maybe, ask a new question about this feature?

              – Bernard
              Feb 23 at 13:54











              6














              You could write



              [leftlvertfrac{partial^{k+l}u_0}
              {{partial x_1}^{k_1}{partial x_2}^{k_2}partial t^l}rightrvert
              leq C]


              enter image description here






              share|improve this answer






























                6














                You could write



                [leftlvertfrac{partial^{k+l}u_0}
                {{partial x_1}^{k_1}{partial x_2}^{k_2}partial t^l}rightrvert
                leq C]


                enter image description here






                share|improve this answer




























                  6












                  6








                  6







                  You could write



                  [leftlvertfrac{partial^{k+l}u_0}
                  {{partial x_1}^{k_1}{partial x_2}^{k_2}partial t^l}rightrvert
                  leq C]


                  enter image description here






                  share|improve this answer















                  You could write



                  [leftlvertfrac{partial^{k+l}u_0}
                  {{partial x_1}^{k_1}{partial x_2}^{k_2}partial t^l}rightrvert
                  leq C]


                  enter image description here







                  share|improve this answer














                  share|improve this answer



                  share|improve this answer








                  edited Feb 22 at 13:52









                  Sigur

                  26.1k457142




                  26.1k457142










                  answered Feb 22 at 13:45









                  José Carlos SantosJosé Carlos Santos

                  8571217




                  8571217























                      5














                      one more variation ...



                      documentclass{article}
                      usepackage{mathtools}
                      DeclarePairedDelimiterabs{lvert}{rvert}

                      begin{document}
                      [
                      abs*{frac{partial^{k+l}u_0}
                      {partial x_1^{k_1}partial x_2^{k_2}partial t^l}} leq C
                      ]
                      end{document}


                      enter image description here






                      share|improve this answer
























                      • How did you produce the frame around the image?

                        – Sigur
                        Feb 22 at 13:55











                      • @Sigur, it is not part of latex code, but drawn by Snipping Tool, which i use for copping image from pdf previewer to site. in it i select option Show Ink selection ...

                        – Zarko
                        Feb 22 at 14:01











                      • Ah, OK. I use Shutter. Maybe there is such frame option there.

                        – Sigur
                        Feb 22 at 14:02











                      • Thanks to you I've just created a plugin for Shutter to add 1px solid blue frame around the image. Now I need to know how to run it automatically when screen shot is created.

                        – Sigur
                        Feb 22 at 15:03











                      • For the frame around formula in LaTeX, simply use boxed{...} inside the math context. Of course, to get the wide white horizontal margin you would have to manually add some space with hspace or qquad

                        – Jhor
                        Feb 22 at 20:55


















                      5














                      one more variation ...



                      documentclass{article}
                      usepackage{mathtools}
                      DeclarePairedDelimiterabs{lvert}{rvert}

                      begin{document}
                      [
                      abs*{frac{partial^{k+l}u_0}
                      {partial x_1^{k_1}partial x_2^{k_2}partial t^l}} leq C
                      ]
                      end{document}


                      enter image description here






                      share|improve this answer
























                      • How did you produce the frame around the image?

                        – Sigur
                        Feb 22 at 13:55











                      • @Sigur, it is not part of latex code, but drawn by Snipping Tool, which i use for copping image from pdf previewer to site. in it i select option Show Ink selection ...

                        – Zarko
                        Feb 22 at 14:01











                      • Ah, OK. I use Shutter. Maybe there is such frame option there.

                        – Sigur
                        Feb 22 at 14:02











                      • Thanks to you I've just created a plugin for Shutter to add 1px solid blue frame around the image. Now I need to know how to run it automatically when screen shot is created.

                        – Sigur
                        Feb 22 at 15:03











                      • For the frame around formula in LaTeX, simply use boxed{...} inside the math context. Of course, to get the wide white horizontal margin you would have to manually add some space with hspace or qquad

                        – Jhor
                        Feb 22 at 20:55
















                      5












                      5








                      5







                      one more variation ...



                      documentclass{article}
                      usepackage{mathtools}
                      DeclarePairedDelimiterabs{lvert}{rvert}

                      begin{document}
                      [
                      abs*{frac{partial^{k+l}u_0}
                      {partial x_1^{k_1}partial x_2^{k_2}partial t^l}} leq C
                      ]
                      end{document}


                      enter image description here






                      share|improve this answer













                      one more variation ...



                      documentclass{article}
                      usepackage{mathtools}
                      DeclarePairedDelimiterabs{lvert}{rvert}

                      begin{document}
                      [
                      abs*{frac{partial^{k+l}u_0}
                      {partial x_1^{k_1}partial x_2^{k_2}partial t^l}} leq C
                      ]
                      end{document}


                      enter image description here







                      share|improve this answer












                      share|improve this answer



                      share|improve this answer










                      answered Feb 22 at 13:49









                      ZarkoZarko

                      128k868167




                      128k868167













                      • How did you produce the frame around the image?

                        – Sigur
                        Feb 22 at 13:55











                      • @Sigur, it is not part of latex code, but drawn by Snipping Tool, which i use for copping image from pdf previewer to site. in it i select option Show Ink selection ...

                        – Zarko
                        Feb 22 at 14:01











                      • Ah, OK. I use Shutter. Maybe there is such frame option there.

                        – Sigur
                        Feb 22 at 14:02











                      • Thanks to you I've just created a plugin for Shutter to add 1px solid blue frame around the image. Now I need to know how to run it automatically when screen shot is created.

                        – Sigur
                        Feb 22 at 15:03











                      • For the frame around formula in LaTeX, simply use boxed{...} inside the math context. Of course, to get the wide white horizontal margin you would have to manually add some space with hspace or qquad

                        – Jhor
                        Feb 22 at 20:55





















                      • How did you produce the frame around the image?

                        – Sigur
                        Feb 22 at 13:55











                      • @Sigur, it is not part of latex code, but drawn by Snipping Tool, which i use for copping image from pdf previewer to site. in it i select option Show Ink selection ...

                        – Zarko
                        Feb 22 at 14:01











                      • Ah, OK. I use Shutter. Maybe there is such frame option there.

                        – Sigur
                        Feb 22 at 14:02











                      • Thanks to you I've just created a plugin for Shutter to add 1px solid blue frame around the image. Now I need to know how to run it automatically when screen shot is created.

                        – Sigur
                        Feb 22 at 15:03











                      • For the frame around formula in LaTeX, simply use boxed{...} inside the math context. Of course, to get the wide white horizontal margin you would have to manually add some space with hspace or qquad

                        – Jhor
                        Feb 22 at 20:55



















                      How did you produce the frame around the image?

                      – Sigur
                      Feb 22 at 13:55





                      How did you produce the frame around the image?

                      – Sigur
                      Feb 22 at 13:55













                      @Sigur, it is not part of latex code, but drawn by Snipping Tool, which i use for copping image from pdf previewer to site. in it i select option Show Ink selection ...

                      – Zarko
                      Feb 22 at 14:01





                      @Sigur, it is not part of latex code, but drawn by Snipping Tool, which i use for copping image from pdf previewer to site. in it i select option Show Ink selection ...

                      – Zarko
                      Feb 22 at 14:01













                      Ah, OK. I use Shutter. Maybe there is such frame option there.

                      – Sigur
                      Feb 22 at 14:02





                      Ah, OK. I use Shutter. Maybe there is such frame option there.

                      – Sigur
                      Feb 22 at 14:02













                      Thanks to you I've just created a plugin for Shutter to add 1px solid blue frame around the image. Now I need to know how to run it automatically when screen shot is created.

                      – Sigur
                      Feb 22 at 15:03





                      Thanks to you I've just created a plugin for Shutter to add 1px solid blue frame around the image. Now I need to know how to run it automatically when screen shot is created.

                      – Sigur
                      Feb 22 at 15:03













                      For the frame around formula in LaTeX, simply use boxed{...} inside the math context. Of course, to get the wide white horizontal margin you would have to manually add some space with hspace or qquad

                      – Jhor
                      Feb 22 at 20:55







                      For the frame around formula in LaTeX, simply use boxed{...} inside the math context. Of course, to get the wide white horizontal margin you would have to manually add some space with hspace or qquad

                      – Jhor
                      Feb 22 at 20:55













                      5














                      Like this?



                      enter image description here



                      documentclass{report}
                      usepackage{amsmath}

                      begin{document}
                      [ Bigglvert
                      frac{partial^{k+l}u_0}
                      {partial^{k_1}{x_1},
                      partial^{k_2}{x_2},
                      partial^{l}{t}}
                      Biggrvert leq C,
                      ]
                      end{document}





                      share|improve this answer





















                      • 1





                        The notation here is wrong I’m afraid. The k_1, k_2 and l should follow the variables, not the partial signs. See i.stack.imgur.com/Jc3v8.png

                        – Ruixi Zhang
                        Feb 23 at 13:04


















                      5














                      Like this?



                      enter image description here



                      documentclass{report}
                      usepackage{amsmath}

                      begin{document}
                      [ Bigglvert
                      frac{partial^{k+l}u_0}
                      {partial^{k_1}{x_1},
                      partial^{k_2}{x_2},
                      partial^{l}{t}}
                      Biggrvert leq C,
                      ]
                      end{document}





                      share|improve this answer





















                      • 1





                        The notation here is wrong I’m afraid. The k_1, k_2 and l should follow the variables, not the partial signs. See i.stack.imgur.com/Jc3v8.png

                        – Ruixi Zhang
                        Feb 23 at 13:04
















                      5












                      5








                      5







                      Like this?



                      enter image description here



                      documentclass{report}
                      usepackage{amsmath}

                      begin{document}
                      [ Bigglvert
                      frac{partial^{k+l}u_0}
                      {partial^{k_1}{x_1},
                      partial^{k_2}{x_2},
                      partial^{l}{t}}
                      Biggrvert leq C,
                      ]
                      end{document}





                      share|improve this answer















                      Like this?



                      enter image description here



                      documentclass{report}
                      usepackage{amsmath}

                      begin{document}
                      [ Bigglvert
                      frac{partial^{k+l}u_0}
                      {partial^{k_1}{x_1},
                      partial^{k_2}{x_2},
                      partial^{l}{t}}
                      Biggrvert leq C,
                      ]
                      end{document}






                      share|improve this answer














                      share|improve this answer



                      share|improve this answer








                      edited Feb 22 at 13:53

























                      answered Feb 22 at 13:46









                      SigurSigur

                      26.1k457142




                      26.1k457142








                      • 1





                        The notation here is wrong I’m afraid. The k_1, k_2 and l should follow the variables, not the partial signs. See i.stack.imgur.com/Jc3v8.png

                        – Ruixi Zhang
                        Feb 23 at 13:04
















                      • 1





                        The notation here is wrong I’m afraid. The k_1, k_2 and l should follow the variables, not the partial signs. See i.stack.imgur.com/Jc3v8.png

                        – Ruixi Zhang
                        Feb 23 at 13:04










                      1




                      1





                      The notation here is wrong I’m afraid. The k_1, k_2 and l should follow the variables, not the partial signs. See i.stack.imgur.com/Jc3v8.png

                      – Ruixi Zhang
                      Feb 23 at 13:04







                      The notation here is wrong I’m afraid. The k_1, k_2 and l should follow the variables, not the partial signs. See i.stack.imgur.com/Jc3v8.png

                      – Ruixi Zhang
                      Feb 23 at 13:04













                      1














                      documentclass{article}

                      begin{document}
                      $ left | frac{partial^{k+1}u_0}{{partial x_1}^{k_1} {partial x_2}^{k_2} partial t^l} right | leq C $
                      end{document}


                      enter image description here






                      share|improve this answer






























                        1














                        documentclass{article}

                        begin{document}
                        $ left | frac{partial^{k+1}u_0}{{partial x_1}^{k_1} {partial x_2}^{k_2} partial t^l} right | leq C $
                        end{document}


                        enter image description here






                        share|improve this answer




























                          1












                          1








                          1







                          documentclass{article}

                          begin{document}
                          $ left | frac{partial^{k+1}u_0}{{partial x_1}^{k_1} {partial x_2}^{k_2} partial t^l} right | leq C $
                          end{document}


                          enter image description here






                          share|improve this answer















                          documentclass{article}

                          begin{document}
                          $ left | frac{partial^{k+1}u_0}{{partial x_1}^{k_1} {partial x_2}^{k_2} partial t^l} right | leq C $
                          end{document}


                          enter image description here







                          share|improve this answer














                          share|improve this answer



                          share|improve this answer








                          edited Feb 22 at 13:48

























                          answered Feb 22 at 13:46









                          Sina AhmadiSina Ahmadi

                          77338




                          77338






























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