List questions from functional-equations

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functional equation in renormalization group theory

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Solve the equation $f(x+y)=\max(f(x),y)+\min(x,f(y))$

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Reason for the integer case and the rational case to be solved differently

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Find all functions by condition

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Suggestion for a functional equation $f'\left(\frac{a}{x}\right)=\frac{x}{f(x)}$ where $f:(0,\infty)\to(0,\infty)$ is differentiable

Published on 17 Dec 2018 - 19:53

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Functions with $\mathrm s(x)^n+ \mathrm c(x)^n \equiv 1$

Published on 18 Dec 2018 - 18:00

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Functional equations and finding isomorphism between groups

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What is the functional derivative of this expression?

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Third kind Fredholm integral equation

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Do these arguments correctly predict $\sum_{r=1}^n \mu(r)$

Published on 25 Mar 2026 - 9:24

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Is my proof correct???

Published on 21 Dec 2018 - 10:24

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Functional equation: $f(3x) = 3f(x)$

Published on 21 Dec 2018 - 14:04

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How to solve this functional equation involving hyperbolic functions?

Published on 25 Mar 2026 - 12:55

List Question

Are There Functions Where $(f\cdot g)^\prime$ is equal to $f^\prime \cdot g^\prime$?

functional equation in renormalization group theory

Solve the equation $f(x+y)=\max(f(x),y)+\min(x,f(y))$

Reason for the integer case and the rational case to be solved differently

Find all functions by condition

Definite Integral in functional relation format

Suggestion for a functional equation $f'\left(\frac{a}{x}\right)=\frac{x}{f(x)}$ where $f:(0,\infty)\to(0,\infty)$ is differentiable

Functions with $\mathrm s(x)^n+ \mathrm c(x)^n \equiv 1$

Functional equations and finding isomorphism between groups

What is the functional derivative of this expression?

Third kind Fredholm integral equation

Do these arguments correctly predict $\sum_{r=1}^n \mu(r)$

Is my proof correct???

Functional equation: $f(3x) = 3f(x)$

How to solve this functional equation involving hyperbolic functions?

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