List questions from inequality

Published on 14 Apr 2026 - 15:30

132

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Prove an inequality with positives $a$, $b$ and $c$.

Published on 15 Apr 2026 - 8:30

664

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Bounding a polynomial from below

Published on 11 Apr 2026 - 20:36

62

Views

Prove of $\Vert A \Vert_\infty$ submultiplicativity

Published on 14 Apr 2026 - 14:34

74

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How can we show that $\left|\frac{e^{-\lambda t}-1}t\right|\le|\lambda|$ for all $t\in\mathbb R\setminus\left\{0\right\}$ and $\lambda\in\mathbb R$?

Published on 15 Apr 2026 - 15:20

84

Views

Is there a non-trivial lower bound for $|a_1+a_2+ \cdots + a_n|$?

Published on 14 Apr 2026 - 22:54

162

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Prove that $\sum_{cyc}\frac{a}{a + b^4 + c^4} \le 1$ where $abc = 1$

Published on 25 Mar 2026 - 9:28

298

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Difficult inequality with 4 variables

Published on 10 Apr 2026 - 1:23

120

Views

About the fact that $\frac{a^2}{b} + \frac{b^2}{a} + 7(a + b) \ge 8\sqrt{2(a^2 + b^2)}$

Published on 17 Apr 2026 - 11:04

391

Views

How can we show that $e^{-2\lambda t}\lambda^2\le\frac1{e^2t^2}$ for all $\lambda,t\ge0$?

Published on 15 Apr 2026 - 10:34

84

Views

Big $O$ of integral and estimate

Published on 14 Apr 2026 - 16:58

57

Views

Maximizing Area of a quadrilateral inside of a square

Published on 14 Apr 2026 - 18:34

285

Views

Prove that $\frac{1}{ab}+\frac{1}{cd} \geq \frac{a^2+b^2+c^2+d^2}{2}$

Published on 17 Apr 2026 - 7:43

94

Views

Doubt in the solution provided to an inequality question

Published on 09 Apr 2026 - 9:17

65

Views

Understanding the example of metric

Published on 10 Apr 2026 - 21:08

List Question

Proving inequality relation

Prove an inequality with positives $a$, $b$ and $c$.

Bounding a polynomial from below

Prove of $\Vert A \Vert_\infty$ submultiplicativity

How can we show that $\left|\frac{e^{-\lambda t}-1}t\right|\le|\lambda|$ for all $t\in\mathbb R\setminus\left\{0\right\}$ and $\lambda\in\mathbb R$?

Is there a non-trivial lower bound for $|a_1+a_2+ \cdots + a_n|$?

Prove that $\sum_{cyc}\frac{a}{a + b^4 + c^4} \le 1$ where $abc = 1$

Difficult inequality with 4 variables

About the fact that $\frac{a^2}{b} + \frac{b^2}{a} + 7(a + b) \ge 8\sqrt{2(a^2 + b^2)}$

How can we show that $e^{-2\lambda t}\lambda^2\le\frac1{e^2t^2}$ for all $\lambda,t\ge0$?

Big $O$ of integral and estimate

Maximizing Area of a quadrilateral inside of a square

Prove that $\frac{1}{ab}+\frac{1}{cd} \geq \frac{a^2+b^2+c^2+d^2}{2}$

Doubt in the solution provided to an inequality question

Understanding the example of metric

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