Elliptic regularity on compact manifold without boundary











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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.










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  • I would look in Partial Differential Equations I and PDE II by Taylor. He develops the theory on manifolds.
    – Neal
    43 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
    43 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






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asked 3 hours ago









S. Cho

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1628












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


















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
















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




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










2 Answers
2






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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
    22 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,
$$
|u|_{H^2} le C|f|_{L^2}.
$$






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    2 Answers
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    2 Answers
    2






    active

    oldest

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    active

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    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
      22 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
      22 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
      22 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
      22 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
    22 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
    22 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 46 mins ago









        Deane Yang

        19.9k562140




        19.9k562140






























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