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Yizhen Chen's user avatar
Yizhen Chen's user avatar
Yizhen Chen's user avatar
Yizhen Chen
  • Member for 7 years, 7 months
  • Last seen this week
12 votes

How to integrate $ \int \frac{x}{\sqrt{x^4+10x^2-96x-71}}dx$?

8 votes

Can we define a norm on $\Bbb{R^\omega}$ in a basis free way?

2 votes

Does the converse of the chain rule hold in general?

2 votes
Accepted

Examples of $C^1(\mathbb{R}^2)$ functions where mixed partials are equal nowhere

1 vote

Integral $\int \frac{2x^2-1}{\pm x(2x^2-1)+2x+ \sqrt{1+2x^2}} d x$

1 vote

Prove that $\lim_{n \to \infty} \int_a^b f(x) \sin^n (x) dx = 0$.

1 vote

Converse of Schauder's Theorem about compactness of adjoint operator

1 vote
Accepted

Recursive relation induction problem: $c_n = \frac{1}{2^n} \cdot \sum_{k \text{ even}}^{0~ \leq ~k~ \leq ~n} {n \choose k}c_k$

1 vote
Accepted

Minimum norm problems - bound on solution

1 vote

Canonicity of the push-pull map for sheaves of sets

0 votes

Dirac measures are extreme points of unit ball of $C(K)^*$.

0 votes

Adjoint property of $f^{-1}$ and $f_*$.

0 votes

does monomorphism of sheaves of abelian groups imply it's injective on the level of open sets?

0 votes

Help on indefinite integral

0 votes

$ \int \frac{1}{2+\sqrt{x+1}+\sqrt{3-x}} \cdot d x $

0 votes

Cases for only one mixed partial derivative is continuous

-1 votes

Ring of integers of cubic number field