List questions from absolute-value

Published on 03 Feb 2020 - 23:32

83

Views

$ \int_R | \frac{ \cos(x) + \cos( \sqrt 2 x) + \cos( \sqrt 3 x)}{1 + x^2} | dx = ? $

Published on 06 Feb 2020 - 10:39

441

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How can I prove the inequality about integration of complex-valued function

Published on 26 Mar 2026 - 17:36

222

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Derivative of function with absolute value denominator?

Published on 29 Mar 2026 - 19:09

265

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What are some alternative to absolute function that is continuous and differentiable everywhere?

Published on 10 Feb 2020 - 1:38

60

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Prove that if $|f|$ is gauge integrable then so is $f$.

Published on 25 Mar 2026 - 8:12

125

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Useful identity, $|ac - bd| \leq \max(a,b) | c-d| + \max(c,d)|a-b|$, how to prove?

Published on 11 Feb 2020 - 20:16

52

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Sublinear Inequality

Published on 28 Mar 2026 - 13:42

42

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Two absolute value equations with two unknowns. Possible to retrieve sign?

Published on 13 Feb 2020 - 12:07

21

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Inequality on distances of probabilities

Published on 13 Feb 2020 - 17:37

291

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Proving that two distances are topologically equivalent.

Published on 28 Mar 2026 - 2:20

127

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Limits of integration for expectation of absolute value of difference between two exponential variables.

Published on 27 Mar 2026 - 7:19

63

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Find $z \in \mathbb{C}$ such that |$z+3i| = 3|z|$

Published on 17 Feb 2020 - 19:30

121

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How I convince my student that $ \sqrt{i^2} \neq (\sqrt{i})^2 $?

Published on 17 Feb 2020 - 21:59

4.2k

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Normalize a vector (an array) - divide by total sum or absolute value?

Published on 27 Mar 2026 - 17:50

List Question

Making an "Opposite Inequality"

$ \int_R | \frac{ \cos(x) + \cos( \sqrt 2 x) + \cos( \sqrt 3 x)}{1 + x^2} | dx = ? $

How can I prove the inequality about integration of complex-valued function

Derivative of function with absolute value denominator?

What are some alternative to absolute function that is continuous and differentiable everywhere?

Prove that if $|f|$ is gauge integrable then so is $f$.

Useful identity, $|ac - bd| \leq \max(a,b) | c-d| + \max(c,d)|a-b|$, how to prove?

Sublinear Inequality

Two absolute value equations with two unknowns. Possible to retrieve sign?

Inequality on distances of probabilities

Proving that two distances are topologically equivalent.

Limits of integration for expectation of absolute value of difference between two exponential variables.

Find $z \in \mathbb{C}$ such that |$z+3i| = 3|z|$

How I convince my student that $ \sqrt{i^2} \neq (\sqrt{i})^2 $?

Normalize a vector (an array) - divide by total sum or absolute value?

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