Mathematics
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yi li
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All Questions Answers
Score Newest
answer
8
Sum of two closed sets in $\mathbb R$ is closed?
Dec 12, 2020
question
6
Prove that flow map $\theta_t$ is orientation preserving
Jun 5, 2021
question
6
Does the Chain Rule Hold for General Derivatives?
Aug 16, 2020
question
5
Prove cylinder local isometric to the plane
Jul 29, 2021
question
5
Pullback of Riemannian volume form under diffeomorphism
Sep 1, 2021
question
4
unit tangent bundle is connected if and only if $M$ is connected.
Jun 26, 2021
question
4
prove $\text{Hom}(V,V) \to \text{Hom}(W,V/W)$ is surjective
Apr 13
question
4
Let $f:Y\to X$ be the proper birational morphism, prove $H^0(Y,\mathcal{O}_Y(D)) \subset H^0(X,\mathcal{O}_X(f_*(D)))$
May 30
question
4
Bound the norm for Hessian by Laplacian Schauder estimate
Mar 11, 2022
question
4
precompact coordinate ball v.s. regular coordinate ball
Jan 7, 2021

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