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Willie Wong's user avatar
Willie Wong's user avatar
Willie Wong
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633 Answers

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4 votes

Derivation on $SO(3)$

4 votes
Accepted

Sobolev imbedding result; proof

4 votes
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A proof for the existence of smooth solution of PDE in form $\Delta u=f(x, u)$ in Michael E. Taylor's book Partial Differential Equations III

4 votes
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Correct curvature tensor of symmetric space of positive definite matrices with trace metric?

4 votes
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Hyperboloids in Minkowski geometry

4 votes
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A question on null geodesics in Lorentzian geometry

4 votes
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A question on Levi-Civita connection and a fixed hyper surface

4 votes
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Maximum principle for hyperbolic PDEs

4 votes
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Existence of smooth functions $f$ satisfying $\sup_{x \in \mathbb{R}} \lvert x^k f^{(q)}(x) \rvert \leq C B^q k^{1/8} q^{q/2}$

4 votes
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How to compute the asymptotics of this oscillatory integral?

4 votes

Lebesgue differentiation theorem at boundary points for Sobolev traces

4 votes

Average as a constant approximation in $L^p$

4 votes
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If function and derivative extend continuously to boundary of domain, can one extend as $C^1$ function?

4 votes
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Finite propagation speed for non-smooth solutions to nonlinear wave equation

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

4 votes
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Lipschitz-regularity of partition of unity

4 votes
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Duality argument

4 votes
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Pull back a vector field

4 votes

Uniformly Lebesgue differentiable functions

4 votes

Why is this integrability condition needed for uniqueness in the continuity equation?

4 votes
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Some questions on the famous Gidas-Ni-Nirenberg 1979 paper

4 votes
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Integral convergence implies pointwise

4 votes

Gauss-Bonnet Theorem on noncompact surface without boundary

4 votes
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wave equation with vanishing trace at infinity

4 votes
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Harmonic analysis on constant curvature hyperbolic spaces of arbitrary dimension

4 votes
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Conservated quantity and hyperbolic equation

4 votes
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Why is this estimate about Besov norms true

4 votes
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Totally geodesic submanifolds of bi-invariant Lie groups

4 votes
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Smoothing-Strichartz estimates for the heat-Schrodinger evolution

4 votes
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Vlasov Poisson: linear momentum conservation

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