User Filip Chindea - Mathematics Stack Exchange

Filip Chindea

Member for 11 years, 8 months
Last seen more than 3 years ago

Bucharest, Romania

10 Answers

Score Activity Newest

24 votes

Accepted

What is infinity divided by infinity?

answered Aug 11, 2012 at 12:06

12 votes

Compute the series : $\sum_{n=1}^{\infty} \frac{4^n n!}{(2n)!}$

answered Aug 7, 2012 at 7:23

11 votes

Good exercises to do/examples to illustrate Seifert - Van Kampen Theorem

answered Aug 5, 2012 at 13:17

7 votes

Coproduct in the category of (noncommutative) associative algebras

answered Jan 7, 2015 at 19:04

4 votes

Really stuck on strategy for this fundamental theorem of algebra type problem.

answered Aug 6, 2012 at 13:44

4 votes

Accepted

Hatcher problem 1.2.3 - technicality in proof of simply connectedness

answered Aug 7, 2012 at 7:33

3 votes

Accepted

How to solve the inequality $2^x\ge a+bx$?

answered Aug 5, 2012 at 15:42

1 vote

Submodularity Proof

answered Aug 11, 2012 at 18:42

0 votes

Evaluating $\int_0^1{\frac{1}{(x+3)^2}}\ln\left(\frac{x+1}{x+3}\right)dx$ using $\frac{dy}{dx}=\frac{2}{(x+3)^2}$ where $y=\frac{x+1}{x+3}$

answered Aug 6, 2012 at 13:35

0 votes

Accepted

What is the reflection in linear algebra

answered Aug 9, 2012 at 16:28