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[SOLVED] Overview of basic facts about Cauchy functional equation

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[SOLVED] If $f(xy)=f(x)f(y)$ then show that $f(x) = x^t$ for some t

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[SOLVED] thoughts about $f(f(x))=e^x$

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[SOLVED] Graph of discontinuous linear function is dense

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[SOLVED] On sort-of-linear functions

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[SOLVED] Examples of functions where $f(ab)=f(a)+f(b)$

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[SOLVED] How to calculate $f(x)$ in $f(f(x)) = e^x$?

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[SOLVED] How to obtain $f(x)$, if it is known that $f(f(x))=x^2+x$?

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[SOLVED] Find $f(x)$ such that $f(f(x)) = x^2 - 2$

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[SOLVED] Function that is both midpoint convex and concave

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[SOLVED] Classifying Functions of the form $f(x+y)=f(x)f(y)$

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[SOLVED] $f(f(x)f(y))+f(x+y)=f(xy)$

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[SOLVED] Find polynomials such that $(x-16)p(2x)=16(x-1)p(x)$

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[SOLVED] Measurable Cauchy Function is Continuous