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8h
reviewed Leave Closed Calculating normal vector to a 3d rotated plane
1d
reviewed No Action Needed Check proof of Fermat's Little Theorem
1d
reviewed Leave Closed Good Book for learning Math
Aug
1
reviewed Reopen Are there any open mathematical puzzles?
Aug
1
reviewed Reopen Expression for negating every other odd number index
Jul
30
reviewed Leave Closed Injections, Surjections, Bijections
Jul
30
reviewed Reopen Find the sum: $\sum_{i=1}^{n}\dfrac{1}{4^i\cdot\cos^2\dfrac{a}{2^i}}$
Jul
30
reviewed Leave Closed Proving that a sequence converges or diverges
Jul
28
reviewed Leave Closed evaluate $\frac 1{1+\sqrt2+\sqrt3} + \frac 1{1-\sqrt2+\sqrt3} + \frac 1{1+\sqrt2-\sqrt3} + \frac 1{1-\sqrt2-\sqrt3}$
Jul
27
reviewed Leave Closed Determinant of Matrix combination
Jul
22
reviewed Leave Closed What does it mean by a function $ f(x)=\exp(O(|x|^2)) $ for $|x|$ large?
Jul
21
reviewed Reopen How to evaluate the definite integral $\int_0^{\pi/2}\ln(2015+\sin^2 x)dx$
Jul
21
reviewed Reopen Elliptic theta function approximations
Jul
17
comment How confident can we be about the validity of the classification of finite simple groups?
@AlexanderGruber: To get this question out of the unanswered queue, your comment would make a good answer, IMO.
Jul
16
reviewed Leave Closed Generalizing Cauchy-Schwarz for more than two vectors
Jul
16
reviewed Leave Closed Why are some branches of mathematics called 'theory' and others not?
Jul
16
reviewed Leave Closed Prove $\int_0^1 ((g'(x))^2-1)^2dx \geq 1$ for smooth $g$ with $g(0)=g(1)=0$
Jul
16
revised Homomorphism of Free Groups
edited tags
Jul
16
answered Homomorphism of Free Groups
Jul
15
revised To show that $e^x > 1+x$ for any $x\ne 0$
edited tags