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Jul
31
asked Are these functions characters?
Jul
24
answered Cubic Planar Graphs have $2^m-1$ Hamilton Cycles
Jul
23
answered Proving that if $p^2 = a^2 + 2b^2$ then also $p$ can be written in form $a^2 +2b^2$
Jul
9
asked For what functions is this theorem correct?
Jun
23
asked Prove that for $\alpha$ an ordinal, $\alpha \le \omega^\alpha$.
Mar
20
asked Dirac delta implies continuous?
Mar
20
answered Is $\frac{\partial x}{\partial y}=\frac{\partial x}{\partial z}\frac{\partial z}{\partial y}$?
Mar
15
asked Badly behaved, but easy-to-manipulate examples of rings to test hypotheses on
Mar
9
asked If $S_\epsilon$ is dense for all $\epsilon$, is $S_0$ dense?
Mar
6
asked Is the pushforward measure a categorical-theoretic pushout?
Mar
5
asked Discriminant is the unique invariant of $\text{SL}_2\mathbb{Z}$ acting on polynomials.
Feb
13
asked 'Elementary' proof of $\tilde{X}$ is contractible iff $\pi_n(X) =0 \forall n \ge 2$.
Jan
27
asked Conservation of bilinear forms and conjugation
Jan
12
asked Groups with no nontrivial topology
Dec
24
asked Motivation for constructing $F$ s.t. $\ker(\text{curl}) \subset \text{Im}(\text{grad})$, $\ker(\text{div}) \subset \text{Im}(\text{curl})$
Nov
29
asked How is half-contour integration possible?
Nov
15
asked Is there a general way to prove series and products are modular?
Nov
9
answered How many subgroups or order 8 an abelian Group of order 72 can have
Oct
24
answered Path connected iff the action of $\pi_1(Y,y)$ on $p^{-1}(y)$ is transitive.
Oct
24
answered Prove that the number of automorphisms in $\mathbb Q[\alpha]$ equals $1$ $(|Aut\mathbb Q[\alpha]|)=1$