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Kira Yamato
  • Member for 8 years
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  • P.L.A.N.T.
6 votes
1 answer
128 views

An example of a function not in $L^2$ but such that $\int_{E} f dm\leq \sqrt{m(E)}$ for every set $E$

6 votes
1 answer
1k views

Riemann problem of nonconvex scalar conservation laws

5 votes
2 answers
513 views

Find the number of polynomial zeros of $z^4-7z^3-2z^2+z-3=0$.

4 votes
1 answer
639 views

Convex hull of convex set boundary

4 votes
1 answer
284 views

Exercise on Rudin about $R^2$ measurable

3 votes
1 answer
149 views

Evaluating $\int_{-\infty}^{\infty} \frac{\cos x}{1+x^2} e^{-ixt} \,\mathrm dx$

3 votes
1 answer
1k views

Problem on Big Rudin about Fourier Transform

3 votes
2 answers
413 views

Iteration of analytic function

3 votes
1 answer
2k views

Evans' proof of parabolic strong maximum principle

3 votes
0 answers
38 views

Gradient control by div and curl

3 votes
1 answer
204 views

logarithmic sobolev inequalities

3 votes
2 answers
178 views

About a function in homogeneous Sobolev spaces

3 votes
2 answers
106 views

A topology question on circle

3 votes
2 answers
118 views

Find a limit as product of cos

2 votes
1 answer
516 views

Helmholtz Decomposition in Sobolev Space

2 votes
0 answers
282 views

About a trace inequality

2 votes
0 answers
136 views

Problem about deformation theorem

2 votes
1 answer
111 views

Two linear independent functions have zero Wronski

2 votes
1 answer
189 views

About fractional Sobolev space

2 votes
2 answers
1k views

Continuity of subdifferential mapping

2 votes
1 answer
76 views

On the boundary of a region

2 votes
1 answer
667 views

$L^2$ estimate of heat equation solution

2 votes
1 answer
76 views

Question in Fanghua Lin's elliptic PDE

2 votes
2 answers
53 views

Understanding the limit $\lim_{t \to \infty} \int_0^\infty \frac{t}{t^2 + x} \sin(1/x)dx$

2 votes
1 answer
60 views

Estimate the minimum of a degree 2007 polynomial on circle

2 votes
0 answers
124 views

Find number of zeros in half plane

1 vote
2 answers
109 views

Prove this $\sup f_n$ has infinite integral

1 vote
2 answers
65 views

If $F$ is the distribution function of an $L^p$ function, then $\lambda^p F(\lambda)\to0$ as $\lambda\to0$

1 vote
1 answer
75 views

Transcendental entire function

1 vote
1 answer
398 views

Apply the theorem of tubular neighborhood