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YOUSEFY
  • Member for 10 years, 10 months
  • Last seen more than a month ago
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  • Novosibirsk, Novosibirsk Oblast, Russia
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Master Student in Novosibirsk State University in Discrete Mathematics and Combinatorial Optimization program

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5
Prove that $\frac1{2^i}\sum\limits_{j=0}^i|2j-i| \binom{i}{j} \leq d\sqrt{i}$ for some constant $d$
Oct 21, 2017
4
Every graph G with at least one edge has a subgraph H with $\delta(H) > \varepsilon(H) \geqslant \varepsilon(G)$
Jul 9, 2015
4
Definition of Random Variable on Measure Theory!
Aug 27, 2015
3
Is this corollary true: If G is k-regular with k $\geq 1$, then G has a 1-factor.
Dec 26, 2016
3
Checking computation of $\sum\limits_{i=1}^{n-1}\sum\limits_{j=i+1}^{n} \frac12$
Mar 6, 2017
3
Analysing a modification for Min-Cut Algorithm!
Apr 2, 2017
3
About Birthday problem: Counting the configurations where people share birthday instead of configurations where people do not share brithday!
Sep 13, 2017
3
How to prove the tightness of Markov's bound?
Sep 18, 2017
2
How are there 21 pairs are symmetric, but not the 36 pairs of a pair of dice..
Jun 8, 2015
2
How is this equation evaluated $\binom {n}2 = \frac{n^2}{2}$?
Aug 9, 2015
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6
What is the consequences to be a person who works in theory of science?
5
What does this long sentence about physics mean?