What are $delta$-shock solutions?












2












$begingroup$


I studied that a measure valued solution of a conservation law $u_t+f(u)_x=0$ is a measurable map $eta : y rightarrow eta_y in Prob(mathbb{R^n})$ which satisfies $partial_t(eta_y, lambda) +partial_x (eta_y, f(lambda)) =0$ in the sense of distribution on $mathbb{R^2_+}$.
In particular, when the conservation law admits $L^{infty}$ solution then $eta_y=delta_{u(y)}$.



Now I am trying to read "Delta-shock Wave Type Solution of
Hyperbolic Systems of Conservation Laws" by Danilov and Shelkovich [1]. In this article




  1. what do they mean by $delta$-shocks?

  2. in which sense these $delta$-shocks are different from the shocks of the conservation laws?


According to the definition which I stated in the begining any shock solution $u in L^{infty}$ can be written as a dirac measure $eta_y=delta_{u(y)}$. So:




  1. are all shocks $delta$-shocks?


Please suggest me the reference





[1] V.G. Danilov, V.M. Shelkovich (2005): "Delta-shock wave type solution of hyperbolic systems of conservation laws", Quart. Appl. Math. 63, 401-427. doi:10.1090/S0033-569X-05-00961-8










share|cite|improve this question











$endgroup$












  • $begingroup$
    Could you please interpret $delta-$ shock as a measure valued solution.. i.e. can we write it like $eta_y$ in the definition of measure valued solution which i mentioned. Thanks in advance
    $endgroup$
    – Rosy
    Dec 21 '18 at 10:34


















2












$begingroup$


I studied that a measure valued solution of a conservation law $u_t+f(u)_x=0$ is a measurable map $eta : y rightarrow eta_y in Prob(mathbb{R^n})$ which satisfies $partial_t(eta_y, lambda) +partial_x (eta_y, f(lambda)) =0$ in the sense of distribution on $mathbb{R^2_+}$.
In particular, when the conservation law admits $L^{infty}$ solution then $eta_y=delta_{u(y)}$.



Now I am trying to read "Delta-shock Wave Type Solution of
Hyperbolic Systems of Conservation Laws" by Danilov and Shelkovich [1]. In this article




  1. what do they mean by $delta$-shocks?

  2. in which sense these $delta$-shocks are different from the shocks of the conservation laws?


According to the definition which I stated in the begining any shock solution $u in L^{infty}$ can be written as a dirac measure $eta_y=delta_{u(y)}$. So:




  1. are all shocks $delta$-shocks?


Please suggest me the reference





[1] V.G. Danilov, V.M. Shelkovich (2005): "Delta-shock wave type solution of hyperbolic systems of conservation laws", Quart. Appl. Math. 63, 401-427. doi:10.1090/S0033-569X-05-00961-8










share|cite|improve this question











$endgroup$












  • $begingroup$
    Could you please interpret $delta-$ shock as a measure valued solution.. i.e. can we write it like $eta_y$ in the definition of measure valued solution which i mentioned. Thanks in advance
    $endgroup$
    – Rosy
    Dec 21 '18 at 10:34
















2












2








2


1



$begingroup$


I studied that a measure valued solution of a conservation law $u_t+f(u)_x=0$ is a measurable map $eta : y rightarrow eta_y in Prob(mathbb{R^n})$ which satisfies $partial_t(eta_y, lambda) +partial_x (eta_y, f(lambda)) =0$ in the sense of distribution on $mathbb{R^2_+}$.
In particular, when the conservation law admits $L^{infty}$ solution then $eta_y=delta_{u(y)}$.



Now I am trying to read "Delta-shock Wave Type Solution of
Hyperbolic Systems of Conservation Laws" by Danilov and Shelkovich [1]. In this article




  1. what do they mean by $delta$-shocks?

  2. in which sense these $delta$-shocks are different from the shocks of the conservation laws?


According to the definition which I stated in the begining any shock solution $u in L^{infty}$ can be written as a dirac measure $eta_y=delta_{u(y)}$. So:




  1. are all shocks $delta$-shocks?


Please suggest me the reference





[1] V.G. Danilov, V.M. Shelkovich (2005): "Delta-shock wave type solution of hyperbolic systems of conservation laws", Quart. Appl. Math. 63, 401-427. doi:10.1090/S0033-569X-05-00961-8










share|cite|improve this question











$endgroup$




I studied that a measure valued solution of a conservation law $u_t+f(u)_x=0$ is a measurable map $eta : y rightarrow eta_y in Prob(mathbb{R^n})$ which satisfies $partial_t(eta_y, lambda) +partial_x (eta_y, f(lambda)) =0$ in the sense of distribution on $mathbb{R^2_+}$.
In particular, when the conservation law admits $L^{infty}$ solution then $eta_y=delta_{u(y)}$.



Now I am trying to read "Delta-shock Wave Type Solution of
Hyperbolic Systems of Conservation Laws" by Danilov and Shelkovich [1]. In this article




  1. what do they mean by $delta$-shocks?

  2. in which sense these $delta$-shocks are different from the shocks of the conservation laws?


According to the definition which I stated in the begining any shock solution $u in L^{infty}$ can be written as a dirac measure $eta_y=delta_{u(y)}$. So:




  1. are all shocks $delta$-shocks?


Please suggest me the reference





[1] V.G. Danilov, V.M. Shelkovich (2005): "Delta-shock wave type solution of hyperbolic systems of conservation laws", Quart. Appl. Math. 63, 401-427. doi:10.1090/S0033-569X-05-00961-8







measure-theory pde weak-derivatives hyperbolic-equations






share|cite|improve this question















share|cite|improve this question













share|cite|improve this question




share|cite|improve this question








edited Dec 20 '18 at 9:34









Harry49

7,49431341




7,49431341










asked Dec 19 '18 at 18:38









RosyRosy

1426




1426












  • $begingroup$
    Could you please interpret $delta-$ shock as a measure valued solution.. i.e. can we write it like $eta_y$ in the definition of measure valued solution which i mentioned. Thanks in advance
    $endgroup$
    – Rosy
    Dec 21 '18 at 10:34




















  • $begingroup$
    Could you please interpret $delta-$ shock as a measure valued solution.. i.e. can we write it like $eta_y$ in the definition of measure valued solution which i mentioned. Thanks in advance
    $endgroup$
    – Rosy
    Dec 21 '18 at 10:34


















$begingroup$
Could you please interpret $delta-$ shock as a measure valued solution.. i.e. can we write it like $eta_y$ in the definition of measure valued solution which i mentioned. Thanks in advance
$endgroup$
– Rosy
Dec 21 '18 at 10:34






$begingroup$
Could you please interpret $delta-$ shock as a measure valued solution.. i.e. can we write it like $eta_y$ in the definition of measure valued solution which i mentioned. Thanks in advance
$endgroup$
– Rosy
Dec 21 '18 at 10:34












0






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',
autoActivateHeartbeat: false,
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%2f3046726%2fwhat-are-delta-shock-solutions%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown

























0






active

oldest

votes








0






active

oldest

votes









active

oldest

votes






active

oldest

votes
















draft saved

draft discarded




















































Thanks for contributing an answer to Mathematics Stack Exchange!


  • Please be sure to answer the question. Provide details and share your research!

But avoid



  • Asking for help, clarification, or responding to other answers.

  • Making statements based on opinion; back them up with references or personal experience.


Use MathJax to format equations. MathJax reference.


To learn more, see our tips on writing great answers.




draft saved


draft discarded














StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f3046726%2fwhat-are-delta-shock-solutions%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown





















































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown

































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown







Popular posts from this blog

Probability when a professor distributes a quiz and homework assignment to a class of n students.

Aardman Animations

Are they similar matrix