Normal bundle to $Z$ in $Y$ is a manifold with same dimension as $Y$ (Exercise 2.3.12 of Guillemin-Pollack)











up vote
1
down vote

favorite












enter image description here



Here we have $l > k$. I let $phi : U times mathbb R^l longrightarrow N(Z;mathbb R^M)$ be the associated parametrization. I thought that to restrict $U times mathbb R^l$ to $U times mathbb R^k$ one should consider the projection map $pi : U times mathbb R^l longrightarrow U times mathbb R^k$. I'm not sure how that helps though, because I thought I needed to prove that the restricted parametrization $pivert_{U times mathbb R^k}$ maps $U times mathbb R^k$ onto $N(Z;Y)$.










share|cite|improve this question


























    up vote
    1
    down vote

    favorite












    enter image description here



    Here we have $l > k$. I let $phi : U times mathbb R^l longrightarrow N(Z;mathbb R^M)$ be the associated parametrization. I thought that to restrict $U times mathbb R^l$ to $U times mathbb R^k$ one should consider the projection map $pi : U times mathbb R^l longrightarrow U times mathbb R^k$. I'm not sure how that helps though, because I thought I needed to prove that the restricted parametrization $pivert_{U times mathbb R^k}$ maps $U times mathbb R^k$ onto $N(Z;Y)$.










    share|cite|improve this question
























      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      enter image description here



      Here we have $l > k$. I let $phi : U times mathbb R^l longrightarrow N(Z;mathbb R^M)$ be the associated parametrization. I thought that to restrict $U times mathbb R^l$ to $U times mathbb R^k$ one should consider the projection map $pi : U times mathbb R^l longrightarrow U times mathbb R^k$. I'm not sure how that helps though, because I thought I needed to prove that the restricted parametrization $pivert_{U times mathbb R^k}$ maps $U times mathbb R^k$ onto $N(Z;Y)$.










      share|cite|improve this question













      enter image description here



      Here we have $l > k$. I let $phi : U times mathbb R^l longrightarrow N(Z;mathbb R^M)$ be the associated parametrization. I thought that to restrict $U times mathbb R^l$ to $U times mathbb R^k$ one should consider the projection map $pi : U times mathbb R^l longrightarrow U times mathbb R^k$. I'm not sure how that helps though, because I thought I needed to prove that the restricted parametrization $pivert_{U times mathbb R^k}$ maps $U times mathbb R^k$ onto $N(Z;Y)$.







      differential-topology






      share|cite|improve this question













      share|cite|improve this question











      share|cite|improve this question




      share|cite|improve this question










      asked yesterday









      Cookie

      8,677123479




      8,677123479



























          active

          oldest

          votes











          Your Answer





          StackExchange.ifUsing("editor", function () {
          return StackExchange.using("mathjaxEditing", function () {
          StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix) {
          StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["$", "$"], ["\\(","\\)"]]);
          });
          });
          }, "mathjax-editing");

          StackExchange.ready(function() {
          var channelOptions = {
          tags: "".split(" "),
          id: "69"
          };
          initTagRenderer("".split(" "), "".split(" "), channelOptions);

          StackExchange.using("externalEditor", function() {
          // Have to fire editor after snippets, if snippets enabled
          if (StackExchange.settings.snippets.snippetsEnabled) {
          StackExchange.using("snippets", function() {
          createEditor();
          });
          }
          else {
          createEditor();
          }
          });

          function createEditor() {
          StackExchange.prepareEditor({
          heartbeatType: 'answer',
          convertImagesToLinks: true,
          noModals: true,
          showLowRepImageUploadWarning: true,
          reputationToPostImages: 10,
          bindNavPrevention: true,
          postfix: "",
          imageUploader: {
          brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
          contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
          allowUrls: true
          },
          noCode: true, onDemand: true,
          discardSelector: ".discard-answer"
          ,immediatelyShowMarkdownHelp:true
          });


          }
          });














           

          draft saved


          draft discarded


















          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f2996338%2fnormal-bundle-to-z-in-y-is-a-manifold-with-same-dimension-as-y-exercise-2%23new-answer', 'question_page');
          }
          );

          Post as a guest





































          active

          oldest

          votes













          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes
















           

          draft saved


          draft discarded



















































           


          draft saved


          draft discarded














          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f2996338%2fnormal-bundle-to-z-in-y-is-a-manifold-with-same-dimension-as-y-exercise-2%23new-answer', 'question_page');
          }
          );

          Post as a guest




















































































          Popular posts from this blog

          How do I know what Microsoft account the skydrive app is syncing to?

          When does type information flow backwards in C++?

          Grease: Live!