Elliptic regularity on compact manifold without boundary











up vote
2
down vote

favorite












Let $(M,g)$ be a Riemannian compact manifold without boundary, and $Delta$ is the Laplace-Beltrami operator on $M$. Is there any result on the elliptic regularity like this:



For any $uin H^1(M)$, and $fin L^2(M)$ such that $Delta u = f$ (in the sens of distributions), Then $u in H^2(M)$.
If there is a nice reference for such regularity result It would be good.










share|cite|improve this question






















  • I would look in Partial Differential Equations I and PDE II by Taylor. He develops the theory on manifolds.
    – Neal
    36 mins ago















up vote
2
down vote

favorite












Let $(M,g)$ be a Riemannian compact manifold without boundary, and $Delta$ is the Laplace-Beltrami operator on $M$. Is there any result on the elliptic regularity like this:



For any $uin H^1(M)$, and $fin L^2(M)$ such that $Delta u = f$ (in the sens of distributions), Then $u in H^2(M)$.
If there is a nice reference for such regularity result It would be good.










share|cite|improve this question






















  • I would look in Partial Differential Equations I and PDE II by Taylor. He develops the theory on manifolds.
    – Neal
    36 mins ago













up vote
2
down vote

favorite









up vote
2
down vote

favorite











Let $(M,g)$ be a Riemannian compact manifold without boundary, and $Delta$ is the Laplace-Beltrami operator on $M$. Is there any result on the elliptic regularity like this:



For any $uin H^1(M)$, and $fin L^2(M)$ such that $Delta u = f$ (in the sens of distributions), Then $u in H^2(M)$.
If there is a nice reference for such regularity result It would be good.










share|cite|improve this question













Let $(M,g)$ be a Riemannian compact manifold without boundary, and $Delta$ is the Laplace-Beltrami operator on $M$. Is there any result on the elliptic regularity like this:



For any $uin H^1(M)$, and $fin L^2(M)$ such that $Delta u = f$ (in the sens of distributions), Then $u in H^2(M)$.
If there is a nice reference for such regularity result It would be good.







reference-request riemannian-geometry elliptic-pde manifolds regularity






share|cite|improve this question













share|cite|improve this question











share|cite|improve this question




share|cite|improve this question










asked 3 hours ago









S. Cho

1628




1628












  • I would look in Partial Differential Equations I and PDE II by Taylor. He develops the theory on manifolds.
    – Neal
    36 mins ago


















  • I would look in Partial Differential Equations I and PDE II by Taylor. He develops the theory on manifolds.
    – Neal
    36 mins ago
















I would look in Partial Differential Equations I and PDE II by Taylor. He develops the theory on manifolds.
– Neal
36 mins ago




I would look in Partial Differential Equations I and PDE II by Taylor. He develops the theory on manifolds.
– Neal
36 mins ago










2 Answers
2






active

oldest

votes

















up vote
3
down vote













This result is true. This is Theorem 6.30 in:



F.W Warner, Foundations of differentiable manifolds and Lie groups. Corrected reprint of the 1971 edition. Graduate Texts in Mathematics, 94. Springer-Verlag, New York-Berlin, 1983.



While there are many books that deal with elliptic regularity on manifolds, Warner's book seems most elementary and oriented towards those who do not know much about analysis, but are familiar with geometry of manifolds.






share|cite|improve this answer





















  • I am very fond of Wells' "Differential analysis on complex manifolds" chapter on Hodge theory. The approach by way of pseudo-differential operators may feel less elementary, but I think it leads to a clean proof and conceptual insights. I read it when I was an early graduate student who was still getting comfortable with Sobolev spaces.
    – Mike Miller
    15 mins ago




















up vote
3
down vote













This follows from the following regularity estimate for the flat Laplacian case (which is, I believe, proved in Warner's book using Fourier series on a torus but also in most standard texts on elliptic PDEs): Given a bounded open domain $Omega subset mathbb{R}^n$, there exists $C>0$ such that for any function (or even just a distribution) $u$ compactly supported in $Omega$,
$$ tag{*} |u|_{H^2} le C|Delta_0 u|_{L^2}, $$
where $Delta_0$ is the standard flat Laplacian.



To extend this to a local regularity estimate for the Laplace-Beltrami operator, it suffices to prove regularity estimate for $u$ compactly supported on a neighborhood of each point $p in M$. If you use geodesic normal coordinates on a sufficiently small neighborhood of $p$, then you can assume that the Laplace-Beltrami operator is of the form
$$
Delta u = (delta^{ij} + a^{ij}(x))partial^2 + b^kpartial_ku
$$

where $|a^{ij}|, |b_k| < epsilon << 1$.
Therefore, if $Delta_g u = f$, then
$$
Delta_0u = -a_{ij}partial^2_{ij}u - b^kpartial_ku + f
$$

Therefore, by $(*)$
$$
|u|_{H^2} le C(epsilon |u|_{H^2} + |f|_{L^2}).
$$

If the neighborhood is sufficiently small, then $Cepsilon < 1$ and therefore,
$$
|u|_{H^2} le C|f|_{L^2}.
$$






share|cite|improve this answer





















    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: "504"
    };
    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%2fmathoverflow.net%2fquestions%2f317084%2felliptic-regularity-on-compact-manifold-without-boundary%23new-answer', 'question_page');
    }
    );

    Post as a guest















    Required, but never shown

























    2 Answers
    2






    active

    oldest

    votes








    2 Answers
    2






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes








    up vote
    3
    down vote













    This result is true. This is Theorem 6.30 in:



    F.W Warner, Foundations of differentiable manifolds and Lie groups. Corrected reprint of the 1971 edition. Graduate Texts in Mathematics, 94. Springer-Verlag, New York-Berlin, 1983.



    While there are many books that deal with elliptic regularity on manifolds, Warner's book seems most elementary and oriented towards those who do not know much about analysis, but are familiar with geometry of manifolds.






    share|cite|improve this answer





















    • I am very fond of Wells' "Differential analysis on complex manifolds" chapter on Hodge theory. The approach by way of pseudo-differential operators may feel less elementary, but I think it leads to a clean proof and conceptual insights. I read it when I was an early graduate student who was still getting comfortable with Sobolev spaces.
      – Mike Miller
      15 mins ago

















    up vote
    3
    down vote













    This result is true. This is Theorem 6.30 in:



    F.W Warner, Foundations of differentiable manifolds and Lie groups. Corrected reprint of the 1971 edition. Graduate Texts in Mathematics, 94. Springer-Verlag, New York-Berlin, 1983.



    While there are many books that deal with elliptic regularity on manifolds, Warner's book seems most elementary and oriented towards those who do not know much about analysis, but are familiar with geometry of manifolds.






    share|cite|improve this answer





















    • I am very fond of Wells' "Differential analysis on complex manifolds" chapter on Hodge theory. The approach by way of pseudo-differential operators may feel less elementary, but I think it leads to a clean proof and conceptual insights. I read it when I was an early graduate student who was still getting comfortable with Sobolev spaces.
      – Mike Miller
      15 mins ago















    up vote
    3
    down vote










    up vote
    3
    down vote









    This result is true. This is Theorem 6.30 in:



    F.W Warner, Foundations of differentiable manifolds and Lie groups. Corrected reprint of the 1971 edition. Graduate Texts in Mathematics, 94. Springer-Verlag, New York-Berlin, 1983.



    While there are many books that deal with elliptic regularity on manifolds, Warner's book seems most elementary and oriented towards those who do not know much about analysis, but are familiar with geometry of manifolds.






    share|cite|improve this answer












    This result is true. This is Theorem 6.30 in:



    F.W Warner, Foundations of differentiable manifolds and Lie groups. Corrected reprint of the 1971 edition. Graduate Texts in Mathematics, 94. Springer-Verlag, New York-Berlin, 1983.



    While there are many books that deal with elliptic regularity on manifolds, Warner's book seems most elementary and oriented towards those who do not know much about analysis, but are familiar with geometry of manifolds.







    share|cite|improve this answer












    share|cite|improve this answer



    share|cite|improve this answer










    answered 2 hours ago









    Piotr Hajlasz

    5,86142253




    5,86142253












    • I am very fond of Wells' "Differential analysis on complex manifolds" chapter on Hodge theory. The approach by way of pseudo-differential operators may feel less elementary, but I think it leads to a clean proof and conceptual insights. I read it when I was an early graduate student who was still getting comfortable with Sobolev spaces.
      – Mike Miller
      15 mins ago




















    • I am very fond of Wells' "Differential analysis on complex manifolds" chapter on Hodge theory. The approach by way of pseudo-differential operators may feel less elementary, but I think it leads to a clean proof and conceptual insights. I read it when I was an early graduate student who was still getting comfortable with Sobolev spaces.
      – Mike Miller
      15 mins ago


















    I am very fond of Wells' "Differential analysis on complex manifolds" chapter on Hodge theory. The approach by way of pseudo-differential operators may feel less elementary, but I think it leads to a clean proof and conceptual insights. I read it when I was an early graduate student who was still getting comfortable with Sobolev spaces.
    – Mike Miller
    15 mins ago






    I am very fond of Wells' "Differential analysis on complex manifolds" chapter on Hodge theory. The approach by way of pseudo-differential operators may feel less elementary, but I think it leads to a clean proof and conceptual insights. I read it when I was an early graduate student who was still getting comfortable with Sobolev spaces.
    – Mike Miller
    15 mins ago












    up vote
    3
    down vote













    This follows from the following regularity estimate for the flat Laplacian case (which is, I believe, proved in Warner's book using Fourier series on a torus but also in most standard texts on elliptic PDEs): Given a bounded open domain $Omega subset mathbb{R}^n$, there exists $C>0$ such that for any function (or even just a distribution) $u$ compactly supported in $Omega$,
    $$ tag{*} |u|_{H^2} le C|Delta_0 u|_{L^2}, $$
    where $Delta_0$ is the standard flat Laplacian.



    To extend this to a local regularity estimate for the Laplace-Beltrami operator, it suffices to prove regularity estimate for $u$ compactly supported on a neighborhood of each point $p in M$. If you use geodesic normal coordinates on a sufficiently small neighborhood of $p$, then you can assume that the Laplace-Beltrami operator is of the form
    $$
    Delta u = (delta^{ij} + a^{ij}(x))partial^2 + b^kpartial_ku
    $$

    where $|a^{ij}|, |b_k| < epsilon << 1$.
    Therefore, if $Delta_g u = f$, then
    $$
    Delta_0u = -a_{ij}partial^2_{ij}u - b^kpartial_ku + f
    $$

    Therefore, by $(*)$
    $$
    |u|_{H^2} le C(epsilon |u|_{H^2} + |f|_{L^2}).
    $$

    If the neighborhood is sufficiently small, then $Cepsilon < 1$ and therefore,
    $$
    |u|_{H^2} le C|f|_{L^2}.
    $$






    share|cite|improve this answer

























      up vote
      3
      down vote













      This follows from the following regularity estimate for the flat Laplacian case (which is, I believe, proved in Warner's book using Fourier series on a torus but also in most standard texts on elliptic PDEs): Given a bounded open domain $Omega subset mathbb{R}^n$, there exists $C>0$ such that for any function (or even just a distribution) $u$ compactly supported in $Omega$,
      $$ tag{*} |u|_{H^2} le C|Delta_0 u|_{L^2}, $$
      where $Delta_0$ is the standard flat Laplacian.



      To extend this to a local regularity estimate for the Laplace-Beltrami operator, it suffices to prove regularity estimate for $u$ compactly supported on a neighborhood of each point $p in M$. If you use geodesic normal coordinates on a sufficiently small neighborhood of $p$, then you can assume that the Laplace-Beltrami operator is of the form
      $$
      Delta u = (delta^{ij} + a^{ij}(x))partial^2 + b^kpartial_ku
      $$

      where $|a^{ij}|, |b_k| < epsilon << 1$.
      Therefore, if $Delta_g u = f$, then
      $$
      Delta_0u = -a_{ij}partial^2_{ij}u - b^kpartial_ku + f
      $$

      Therefore, by $(*)$
      $$
      |u|_{H^2} le C(epsilon |u|_{H^2} + |f|_{L^2}).
      $$

      If the neighborhood is sufficiently small, then $Cepsilon < 1$ and therefore,
      $$
      |u|_{H^2} le C|f|_{L^2}.
      $$






      share|cite|improve this answer























        up vote
        3
        down vote










        up vote
        3
        down vote









        This follows from the following regularity estimate for the flat Laplacian case (which is, I believe, proved in Warner's book using Fourier series on a torus but also in most standard texts on elliptic PDEs): Given a bounded open domain $Omega subset mathbb{R}^n$, there exists $C>0$ such that for any function (or even just a distribution) $u$ compactly supported in $Omega$,
        $$ tag{*} |u|_{H^2} le C|Delta_0 u|_{L^2}, $$
        where $Delta_0$ is the standard flat Laplacian.



        To extend this to a local regularity estimate for the Laplace-Beltrami operator, it suffices to prove regularity estimate for $u$ compactly supported on a neighborhood of each point $p in M$. If you use geodesic normal coordinates on a sufficiently small neighborhood of $p$, then you can assume that the Laplace-Beltrami operator is of the form
        $$
        Delta u = (delta^{ij} + a^{ij}(x))partial^2 + b^kpartial_ku
        $$

        where $|a^{ij}|, |b_k| < epsilon << 1$.
        Therefore, if $Delta_g u = f$, then
        $$
        Delta_0u = -a_{ij}partial^2_{ij}u - b^kpartial_ku + f
        $$

        Therefore, by $(*)$
        $$
        |u|_{H^2} le C(epsilon |u|_{H^2} + |f|_{L^2}).
        $$

        If the neighborhood is sufficiently small, then $Cepsilon < 1$ and therefore,
        $$
        |u|_{H^2} le C|f|_{L^2}.
        $$






        share|cite|improve this answer












        This follows from the following regularity estimate for the flat Laplacian case (which is, I believe, proved in Warner's book using Fourier series on a torus but also in most standard texts on elliptic PDEs): Given a bounded open domain $Omega subset mathbb{R}^n$, there exists $C>0$ such that for any function (or even just a distribution) $u$ compactly supported in $Omega$,
        $$ tag{*} |u|_{H^2} le C|Delta_0 u|_{L^2}, $$
        where $Delta_0$ is the standard flat Laplacian.



        To extend this to a local regularity estimate for the Laplace-Beltrami operator, it suffices to prove regularity estimate for $u$ compactly supported on a neighborhood of each point $p in M$. If you use geodesic normal coordinates on a sufficiently small neighborhood of $p$, then you can assume that the Laplace-Beltrami operator is of the form
        $$
        Delta u = (delta^{ij} + a^{ij}(x))partial^2 + b^kpartial_ku
        $$

        where $|a^{ij}|, |b_k| < epsilon << 1$.
        Therefore, if $Delta_g u = f$, then
        $$
        Delta_0u = -a_{ij}partial^2_{ij}u - b^kpartial_ku + f
        $$

        Therefore, by $(*)$
        $$
        |u|_{H^2} le C(epsilon |u|_{H^2} + |f|_{L^2}).
        $$

        If the neighborhood is sufficiently small, then $Cepsilon < 1$ and therefore,
        $$
        |u|_{H^2} le C|f|_{L^2}.
        $$







        share|cite|improve this answer












        share|cite|improve this answer



        share|cite|improve this answer










        answered 39 mins ago









        Deane Yang

        19.9k562140




        19.9k562140






























            draft saved

            draft discarded




















































            Thanks for contributing an answer to MathOverflow!


            • 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.





            Some of your past answers have not been well-received, and you're in danger of being blocked from answering.


            Please pay close attention to the following guidance:


            • 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.


            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%2fmathoverflow.net%2fquestions%2f317084%2felliptic-regularity-on-compact-manifold-without-boundary%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

            Eastern Orthodox Church

            Zagreb

            Understanding the information contained in the Deep Space Network XML data?