ivan

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878 reputation

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	location	Bulgaria
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visits	member for	1 year, 8 months
	seen	17 hours ago
stats	profile views	60

I have given up mathematics after highschool but still it is a great hobby. I am mainly interested in inequalities, euclidean geometry and combinatorics.

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32 Answers

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7	How to prove this inequality $\sqrt{\frac{ab+bc+cd+da+ac+bd}{6}}\geq \sqrt[3]{{\frac{abc+bcd+cda+dab}{4}}}$
5	Inequality. $\sqrt{\frac{11a}{5a+6b}}+\sqrt{\frac{11b}{5b+6c}}+\sqrt{\frac{11c}{5c+6a}} \leq 3$
3	Combinatorially equivalent polyhedra?
2	A functional equation problem
2	about the gaussian integral $\int_0^{\infty} e^{-x^2}\ \mathrm{d}x$

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878 Reputation

+10	Combinatorially equivalent polyhedra?
+10	How to prove $\frac{\pi^2}{6}\le \int_0^{\infty} \sin(x^{\log x}) \ \mathrm dx $?
+10	Minkowski Inequality for $p \le 1$
+15	$a_1t^k\leq-\sqrt{1+x^2}+x\operatorname{arcsinh}{x}+1\leq a_2t^k,\ \forall\ t\in[0,\epsilon]$?

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5 Questions

votes activity newest

8	A difficult symmetric inequality
5	Power means inequality
4	Is this AM/GM refinement correct or not?
3	Ellipse and circles
0	On a AM/GM refinement

36 Tags

34 inequality × 27	3 terminology
3 logarithms × 2	2 real-analysis × 2
3 homework × 2	2 convex-analysis × 2
3 combinatorial-geometry	2 gamma-function × 2
3 polyhedra	2 algebra-precalculus × 2

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5 Accounts

$Mathematics Stack Exchange$	Mathematics	878 rep	112
	Stack Overflow	242 rep	27
	Super User	101 rep	1
	English Language & Usage	101 rep
	Unix & Linux	101 rep	1

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100 Votes Cast

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