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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] 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] Graph of discontinuous linear function is dense

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

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[SOLVED] Continuous and additive implies linear

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[SOLVED] Measurable Cauchy Function is Continuous

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[SOLVED] $g(x+y)+g(x)g(y)=g(xy)+g(x)+g(y)$ for all $x,y$.

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