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Digests
Guy
Mostly interested in algebra, commutative or not commutative, and tropical algebra.
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Top Questions
8
votes
Functional Equation $f(f'(x))=-f(x)$
differential-equations
functional-equations
asked Jan 8 '15 at 19:59
math.stackexchange.com
5
votes
Basis in infinite dimensional Hilbert spaces
functional-analysis
hilbert-spaces
asked Jan 23 '15 at 14:16
math.stackexchange.com
Top Answers
17
Simple Proof of the Euler Identity $\exp{i\theta}=\cos{\theta}+i\sin{\theta}$
math.stackexchange.com
8
Investigate convergence of $\sum_{n=2}^\infty \frac{1}{n(n-1)}$
math.stackexchange.com
6
Convergence of $\sum\limits_{n=1}^\infty \frac {n+1}{2^n}$.
math.stackexchange.com
5
Semi-ring with isomorphic additive and multiplicative structure
math.stackexchange.com
5
Proving that $f(x)=x^3+x+2$ is bijective without calculus
math.stackexchange.com
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