List questions from functional-equations

Published on 05 Jun 2013 - 21:19

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A functional equation with inequality

Published on 26 Mar 2026 - 18:30

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Given $f(x+y)=f(x)f(y), f'(0)=11,f(3)=3$, what is $f'(3)$?

Published on 14 Jun 2013 - 12:35

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Playing with a functional equation

Published on 14 Jun 2013 - 15:59

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Is a function $f$ satisfying $f(x+1) = f(x) + 1$ and $f(x^2) = (f(x))^2$ odd or even?

Published on 15 Jun 2013 - 11:22

32

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A question about scaling

Published on 16 Jun 2013 - 4:04

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Overview of basic facts about Cauchy functional equation

Published on 24 Feb 2026 - 0:09

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Could we compute $P(t^2)$?

Published on 08 Jul 2013 - 13:30

57

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Program to determine the relationship of one variable to several possible variables

Published on 30 Mar 2026 - 11:07

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Solving Functional Equations

Published on 10 Jul 2013 - 20:22

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How find the $f(x+f(y))+f(y+f(z))+f(z+f(x))=0,$

Published on 11 Jul 2013 - 2:31

118

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Functional equation problem: $ f ( x ) + \frac 1 { x + 1 } = f ( x + 1 ) $

Published on 11 Jul 2013 - 18:29

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Solve the equation about matrix

Published on 14 Jul 2013 - 22:27

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Find all real polynomials $p(x)$ that satisfy $\sin( p(x) ) = p( \sin(x) )$

Published on 15 Jul 2013 - 7:01

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About the addition formula $f(x+y) = f(x)g(y)+f(y)g(x)$

Published on 15 Jul 2013 - 21:21

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The value of the trilogarithm at $\frac{1}{2}$

A functional equation with inequality

Given $f(x+y)=f(x)f(y), f'(0)=11,f(3)=3$, what is $f'(3)$?

Playing with a functional equation

Is a function $f$ satisfying $f(x+1) = f(x) + 1$ and $f(x^2) = (f(x))^2$ odd or even?

A question about scaling

Overview of basic facts about Cauchy functional equation

Could we compute $P(t^2)$?

Program to determine the relationship of one variable to several possible variables

Solving Functional Equations

How find the $f(x+f(y))+f(y+f(z))+f(z+f(x))=0,$

Functional equation problem: $ f ( x ) + \frac 1 { x + 1 } = f ( x + 1 ) $

Solve the equation about matrix

Find all real polynomials $p(x)$ that satisfy $\sin( p(x) ) = p( \sin(x) )$

About the addition formula $f(x+y) = f(x)g(y)+f(y)g(x)$

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