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 20h answered Proving $AD_1A^{-1}=D_2$ 21h answered $b^{\frac{m}{n}}=(b^{\frac{1}{n}})^m=(b^m)^{\frac{1}{n}}$ except $b$ is not negative when $n$ is Even. 1d answered Up to isomorphism 1d answered $f:[a,b] \to R$ is continuous and $\int_a^b{f(x)g(x)dx}=0$ for every continuous function $g:[a,b]\to R$ 1d answered Why are we defining the norms on certain vector spaces the way they are? 2d answered Murder at Hilbert's Hotel! Apr21 answered How to solve the derivative of $b^x$ using the defintion Apr20 answered Analog clock with same hands - sometimes one can't tell time Apr19 answered Lebesgue measure of graph of $\sin{\frac{1}{x}}$ on $[0,1]$ Apr18 answered Number Theory - Multiple of $36$ problem Apr18 answered Mathematical induction Apr17 answered How do pocket calculators calculate exponents? Apr17 answered Need help with proof of existence of $\sqrt{2}$ Apr17 answered Is $2^{\aleph_0} = \aleph_1$? Apr16 answered For matrices, if $AB=BA$, then does it follow that $B^{2}A=AB^{2}$? Apr16 asked Decoding the sign expansion of surreal numbers Apr12 answered What separates an axiom from a proposition? Apr12 answered Product of subgroups which is not a group - infinite case Apr12 asked How to maximize the minimal amount not payable with the exchange of at most two coins? Apr12 answered What's the difference between $\sum_{r=1}^n(ar+b)$ and $\sum_{r=1}^nar+b$