10,338 reputation
33067
bio website
location Moscow, Russia
age
visits member for 4 years, 2 months
seen 45 mins ago

umagon at google mail


Jul
12
reviewed Close Is it true? The inequality $\frac{pa+qb}{a+b} \le p+q$,
Jul
12
reviewed Close Interesting examples of Cauchy's Integral formula
Jul
12
reviewed Close Proving an inequality about a $\sin x$ and $\exp x$
Jul
11
reviewed No Action Needed Version of Chevalley's Theorem proving $\mathbb{F}_q$ is a $C_1$-field for $\mathbb{Z}/p^n\mathbb{Z}$?
Jul
11
answered Recurrence $(n+2)\text{Cat}_{n+1}=(4n+2)\text{Cat}_n$ for non-crossing matchings
Jul
11
reviewed Close deriving $y=\sqrt{x+\sqrt{x+\sqrt{x}}\cdots} $
Jul
11
reviewed Close Dealing with Fatigue
Jul
11
reviewed Close Functions with cardinals as domain
Jul
11
reviewed Leave Closed Checking a formula works for many numbers
Jul
11
reviewed Close Probabilty with profit question.
Jul
11
reviewed Reviewed Primary school math regarding circles
Jul
11
reviewed Reviewed Proof on limit superior and limit inferior of a set
Jul
11
reviewed Leave Closed Eigenvectors of two matrices whose sum is an identity matrix?
Jul
11
reviewed Close How to integrate $\int \frac{x^2+\sin x}{2x+\cos x}dx=?$
Jul
11
reviewed Close Find the term of the G.P.
Jul
11
reviewed Looks OK Proving that $f(n)$ is an integer using mathematical induction
Jul
11
reviewed Close $y' = \exp(-\frac{y}{x}) + \frac{y}{x}$
Jul
11
reviewed Close infinite sum of alternating series $\sum_{n = 1}^{\infty} (-1)^{n + 1} \frac{n^2}{1 + n^3}$
Jul
10
reviewed No Action Needed Limit where they have taken out the absolute value
Jul
10
reviewed Close proving $\int_{0}^{1}f=A$ when $f:\left [ 0,1 \right ] \rightarrow \mathbb{R}$