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114 views

Has this logarithmic volume functional been studied?

$\newcommand{\M}{\mathcal{M}} \newcommand{\N}{\mathcal{N}} \newcommand{\VolM}{\text{Vol}_{\M}} \newcommand{\VolN}{\text{Vol}_{\N}}$ This question is mainly a reference request. (It is a cross-post ...
Asaf Shachar's user avatar
  • 6,741
4 votes
0 answers
244 views

A simple proof that all the symmetries of the Dirichlet energy are conformal

This is a cross-post. It seems to be folklore knowledge that all the (source) symmetries of the $d$-Dirichlet energy are conformal maps. Specifically, I have found this nice proof for the following ...
Asaf Shachar's user avatar
  • 6,741
4 votes
0 answers
140 views

Has this functional been studied?

$\newcommand{\M}{\mathcal{M}}$ $\newcommand{\N}{\mathcal{N}}$ $\newcommand{\TM}{\operatorname{T\M}}$ $\newcommand{\TN}{\operatorname{T\N}}$ This is a cross-post from MSE. Let $\M,\N$ be Riemannian ...
Asaf Shachar's user avatar
  • 6,741
6 votes
2 answers
207 views

Are all symmetries of the Dirichlet functional isometries?

This is a cross-post from MSE (no answer there). Let $M,N$ be oriented $d$-dimensional Riemannian manifolds, $M$ compact*, and let $f:M \to N$ be smooth. Consider the Dirichlet energy functional: $...
Asaf Shachar's user avatar
  • 6,741
13 votes
1 answer
739 views

Is this expression for the Laplacian of conformal maps between Riemannian manifolds known?

$\newcommand{\M}{\mathcal{M}}$ $\newcommand{\N}{\mathcal{N}}$ $\newcommand{\Hom}{\operatorname{Hom}}$ $\newcommand{\tr}{\operatorname{tr}}$ $\newcommand{\TM}{\operatorname{T\M}}$ $\newcommand{\TN}{\...
Asaf Shachar's user avatar
  • 6,741
5 votes
2 answers
730 views

Good references on the theory of harmonic mappings between Riemannian manifolds

I am currently reading the book by Professor Jost, "Riemannian geometry and geometric analysis", the last chapter on harmonic maps. It talks mainly about existence and regularity of the theory of ...
Changyu Guo's user avatar
  • 1,881
3 votes
0 answers
96 views

Invariant Lagrangians of a connection and its derivatives: how do they look like?

Let $$ L=L(\Gamma,\partial\Gamma,\ldots,\partial^n\Gamma) $$ be a Lagrangian depending on a linear symmetric connection $\Gamma$ on the tangent space of a manifold $M$ together with its derivatives up ...
Giovanni Moreno's user avatar