Luis Yanka Annalisc's user avatar
Luis Yanka Annalisc's user avatar
Luis Yanka Annalisc's user avatar
Luis Yanka Annalisc
  • Member for 2 years, 10 months
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8 votes
2 answers
2k views

Why don't we study hyperbolic equations as elliptic and parabolic equations?

5 votes
2 answers
1k views

Taylor expansion of the square of the distance function on a Riemannian manifold [closed]

5 votes
2 answers
994 views

How to prove the second Korn inequality?

4 votes
0 answers
119 views

A question of the book "Regularity Theory for elliptic PDE"

4 votes
1 answer
552 views

The decay of Fourier coefficients and the continuity of functions

4 votes
1 answer
293 views

The behavior of $ \nabla u $ on the boundary for Poisson equations

4 votes
2 answers
207 views

How to prove $ \sum_{k=1}^{n}f(a_k)\leq nf\left(\frac{b}{n}\right) $ for sufficiently large $ n $ here?

4 votes
1 answer
233 views

Does the homeomorphism have a non-negative or non-positive determinant?

4 votes
1 answer
223 views

Geodesics on orthogonal matrix

4 votes
1 answer
244 views

Conformal maps between two given domains

4 votes
1 answer
94 views

A formula in harmonic heat flow

3 votes
2 answers
412 views

A question on the manifold $ \{n\otimes n-m\otimes m:n,m\in S^2,(n,m)=0\} $

3 votes
1 answer
199 views

Schauder estimates with boundary conditions

3 votes
0 answers
286 views

How to prove the polar decomposition of unbounded operators?

3 votes
0 answers
106 views

$ f,g\in \mathrm{VMO} $ but $ f\cdot g\notin \mathrm{VMO} $

3 votes
0 answers
119 views

How can I show that the map of cut point is continuous?

2 votes
0 answers
109 views

Some problems about energy estimates of elliptic equation

2 votes
0 answers
68 views

The Green function for elliptic systems in two dimensions

2 votes
0 answers
234 views

Caccioppoli inequality in $ \mathbb{R}^2 $

2 votes
0 answers
110 views

How to learn Strichartz estimates for wave equations?

2 votes
0 answers
110 views

Local smoothness of harmonic heat flow

2 votes
0 answers
65 views

$ \varepsilon $-regularity, harmonic maps vs harmonic heat flow

2 votes
1 answer
114 views

Disturbance of self-adjoint operator

2 votes
0 answers
85 views

How to show $ |(Bx,x)|\leq (Ax,x) $ for any $ x\in D(A) $ here?

2 votes
0 answers
88 views

Harmonic heat flow, formal and rigorous

1 vote
1 answer
146 views

How to show that $ u $ is vanishing in $ \mathbb{R}^3\setminus B_1 $?

1 vote
0 answers
38 views

Mixed boundary condition of parabolic equations

1 vote
0 answers
110 views

Integral flow that can commute to Laplacian operator

1 vote
1 answer
108 views

How to prove $ \|u\|_{L^{\infty}}\leq C\|\partial_1\square u\|_{L^1} $ for any $ u\in C_0^{\infty}(\mathbb{R}^{1+2}) $?

1 vote
1 answer
118 views

Wave equation in $ \Omega\times(0,T) $