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33069
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location Moscow, Russia
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visits member for 4 years, 3 months
seen 4 hours ago

umagon at google mail


Jul
10
reviewed Close Find values of the parameters in Predator prey model
Jul
9
reviewed Close $A+A^2B+B=0$ implies $A^2+I$ invertible?
Jul
9
reviewed Close How to understand some bewildering limits of sequences of sets
Jul
9
reviewed Close Why do probabilists have a preoccupation with urns?
Jul
9
reviewed Close Value of the logarithmic expression
Jul
9
reviewed Leave Closed Integral curves and ODE
Jul
9
reviewed Leave Closed Convergence in Probability (weak law of large numbers)
Jul
9
reviewed Leave Closed What Is The Product Functor
Jul
9
reviewed Leave Closed Determine if the following functions are multiplicative…
Jul
9
comment Prove that $\sum_{k=0}^{m}\binom{m}{k}\binom{n+k}{m}=\sum_{k=0}^{m}\binom{n}{k}\binom{m}{k}2^k$
related: wiki: Delannoy numbers
Jul
8
comment Elementary, direct proof of when $5$ is a quadratic residue mod $p$
related: Special Cases of Quadratic Reciprocity and Counting Fixed Points
Jul
8
reviewed Close The future of the orbit of a point is a closed set
Jul
8
reviewed Looks OK Simple integral question
Jul
8
reviewed Close Isosceles triangle - Geometry Help
Jul
7
reviewed Close Matrix with trace zero
Jul
2
awarded  Curious
Jun
24
reviewed Close Name the property $f(x) \ge x$
Jun
24
reviewed Close Show $\exists x\in\mathbb{R}^2$ such that $g(x)\neq x$ for all $1\neq g\in G$ for a movement
Jun
24
reviewed Close Determine the convergence of the infinite series
Jun
24
comment Contractible Subspace and Homotopy Equivalence
E.g. $X=S^1$, $A=S^1-pt$.