List questions from inequality

Published on 07 Apr 2026 - 2:51

148

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if $a^2+b^2+c^2+2\rho(ab+bc+ca)\ge0$ then $\rho\ge-1/2$

Published on 09 Aug 2018 - 19:17

166

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An interpolation inequality for Fourier cosine series

Published on 26 Mar 2026 - 23:11

251

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inequality in geometry

Published on 26 Mar 2026 - 17:30

131

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Bounding $(x^n-y^n)/(x-y)$?

Published on 10 Aug 2018 - 12:57

84

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A direct way to an inequality : Ferrari's identities

Published on 25 Mar 2026 - 16:02

160

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$ABC$ is a triangle there are points $D, E$ and $F$ on sides $AC, AB$ and $BC$ respectively if $AF = 4$ and $BD = 12$ find the minimum value of $EC$

Published on 27 Mar 2026 - 1:47

127

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Find all positive integers x , satisfying the inequality for $a,b,c \in \mathbb{R}^+ $

Published on 10 Aug 2018 - 14:57

83

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$P, Q$ and $R$ are prime numbers. $P + Q = R$ and $1 < P < Q.$ What is the value of $P$?

Published on 31 Mar 2026 - 20:27

182

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How to prove AM-GM by induction 3

Published on 25 Mar 2026 - 12:48

475

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Prove that $\int_0^x \frac{\sin t}{t} dt > \arctan x $ for $x>0$

Published on 11 Aug 2018 - 3:20

27

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Question about relationship between two inequality equations

Published on 12 Aug 2018 - 6:58

157

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How one integrate both sides of the inequality

Published on 12 Aug 2018 - 8:57

115

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Inequality about Schur

Published on 26 Mar 2026 - 19:28

118

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Counterexample to $\| X - Y \| \le \left\| \begin{pmatrix} X & 0 \\ 0 & Y \end{pmatrix} \right\|$?

Published on 12 Aug 2018 - 15:06

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Compare $\arcsin (1)$ and $\tan (1)$

if $a^2+b^2+c^2+2\rho(ab+bc+ca)\ge0$ then $\rho\ge-1/2$

An interpolation inequality for Fourier cosine series

inequality in geometry

Bounding $(x^n-y^n)/(x-y)$?

A direct way to an inequality : Ferrari's identities

$ABC$ is a triangle there are points $D, E$ and $F$ on sides $AC, AB$ and $BC$ respectively if $AF = 4$ and $BD = 12$ find the minimum value of $EC$

Find all positive integers x , satisfying the inequality for $a,b,c \in \mathbb{R}^+ $

$P, Q$ and $R$ are prime numbers. $P + Q = R$ and $1 < P < Q.$ What is the value of $P$?

How to prove AM-GM by induction 3

Prove that $\int_0^x \frac{\sin t}{t} dt > \arctan x $ for $x>0$

Question about relationship between two inequality equations

How one integrate both sides of the inequality

Inequality about Schur

Counterexample to $\| X - Y \| \le \left\| \begin{pmatrix} X & 0 \\ 0 & Y \end{pmatrix} \right\|$?

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