List questions from functional-equations

Published on 10 Apr 2026 - 9:48

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secants, exponentials, quotient structures

Published on 11 Apr 2026 - 9:30

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Correct order of books for a beginner

Published on 06 Aug 2012 - 12:19

183

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Indeterminacy in second degree equations of Spencer-Brown's "Laws of Form"

Published on 06 Apr 2026 - 22:17

117

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Determining a function through three equations

Published on 11 Apr 2026 - 7:05

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Seeking a contest question on functional equation on $[-1,1]$

Published on 11 Apr 2026 - 4:28

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Find all continuous functions $ f:\mathbb{R}\to\mathbb{R}$, that satisfy $f(xy)=f(\frac{x^2+y^2}{2})+(x-y)^2$

Published on 19 Aug 2012 - 3:35

98

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Show that for this function the stated is true.

Published on 20 Aug 2012 - 6:14

1.6k

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$g(x)$ is a function such that $g(x+1)+g(x-1)=g(x)$, $x \in \mathbb{R}$. For what value of $p$, $g(x+p)=g(x)$.

Published on 21 Aug 2012 - 7:28

177

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Reverse engineer a Bayesian estimate?

Published on 10 Apr 2026 - 19:06

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The functional equation $f(x)+f(y)+f(z)+f(x+y+z)=f(x+y)+f(y+z)+f(z+x)$

Published on 23 Aug 2012 - 19:49

1k

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Cauchy's functional equation for $\mathbb R^n$

Published on 24 Aug 2012 - 15:23

123

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Delta function question

Published on 09 Apr 2026 - 14:18

390

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find all continuous function $f:\mathbb R^+\to\mathbb R^+$ satisfy: $f(x)=f(\frac{x+1}{x+2})$

Published on 27 Aug 2012 - 19:20

123

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Convexity conditions for $f$ and $\dfrac {1} {f}$

Published on 28 Aug 2012 - 7:46

List Question

Solution space to a functional equation

secants, exponentials, quotient structures

Correct order of books for a beginner

Indeterminacy in second degree equations of Spencer-Brown's "Laws of Form"

Determining a function through three equations

Seeking a contest question on functional equation on $[-1,1]$

Find all continuous functions $ f:\mathbb{R}\to\mathbb{R}$, that satisfy $f(xy)=f(\frac{x^2+y^2}{2})+(x-y)^2$

Show that for this function the stated is true.

$g(x)$ is a function such that $g(x+1)+g(x-1)=g(x)$, $x \in \mathbb{R}$. For what value of $p$, $g(x+p)=g(x)$.

Reverse engineer a Bayesian estimate?

The functional equation $f(x)+f(y)+f(z)+f(x+y+z)=f(x+y)+f(y+z)+f(z+x)$

Cauchy's functional equation for $\mathbb R^n$

Delta function question

find all continuous function $f:\mathbb R^+\to\mathbb R^+$ satisfy: $f(x)=f(\frac{x+1}{x+2})$

Convexity conditions for $f$ and $\dfrac {1} {f}$

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