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May
2
accepted No normal subgroup of a subgroup of $S_n$ imply the subgroup is the one of even permutations or consists of two elements
May
2
accepted If $G$ acts non-trivially on a set then it has a proper normal subgroup of finite index
May
1
accepted Eigenvalues of $I-A^{t}A$ where $A$ is a semi orthogonal matrix
Apr
25
accepted Difference between definitions of $p$-subgroup and Sylow $p$-subgroup
Apr
23
accepted Subgroups of every order dividing the order of the group imply the group is abelian?
Apr
17
accepted Quotient topology by identifying the boundary of a circle as one point
Apr
6
accepted Finding the singularity type at $z=0$ of $\frac{1}{\cos(\frac{1}{z})}$
Nov
1
accepted Distance of a point from a line
Sep
6
accepted Computing in Matlab, for a $n\times2$ matrix, for each row$\theta_{0}*\text{first element in row}+\theta_{1}*\text{second element in row}$
Aug
30
accepted How to read a contour plot?
Aug
30
accepted When is a power of $m$-cycle is also an $m$-cycle?
Aug
11
accepted Proving that the intersection of a Sylow p-group with a normal subgroup is also a Sylow p-group
Nov
16
accepted How to write a function that operates elementwise on a matrix?
Oct
29
accepted Learning Abstract Algebra for a graduate degree
Oct
23
accepted Why is the order of $X_{2n}$ is at most $6$ where $X_{2n}=\langle x,y\mid x^{n}=y^{2}=1,xy=yx^{2}\rangle$?
Oct
23
accepted Why does knowing where two adjacent vertices of regular $n$-gon move under rigid motion determines the motion?
Oct
19
accepted Covering a chess board with $2$ missing places with $31$ dominoes
Oct
19
accepted What is the Identity of the Reals mod $1$?
Oct
8
accepted How does showing that all norms are strongly equivalent imply that the identity map and the norm map are continuous functions?
Oct
8
accepted Finding functions $g_{n}$ with norm $1$ s.t $|\phi(g_{n})|\to||\phi||$ where $\phi(g)=\int_{0}^{1}fg$ for some fixed $f\in C([0,1])$