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Jun
1
reviewed No Action Needed Doubt in Calculus Limit Problem
Jun
1
reviewed No Action Needed How to work out the formula that connects several numbers
May
30
reviewed No Action Needed Can a polygon have four 90 degree corners and still not be a rectangle?
May
26
answered How to prove that for any $n$ in $\mathbb{N}$ that $(\frac{3}{2})^n \ge n$?
May
12
awarded  Yearling
May
11
revised Rigorous proof for the following
fixed latex
May
11
suggested suggested edit on Rigorous proof for the following
May
10
accepted $N_Q(R)=N_Q(Q\cap R)$ where $Q, R \le P$, $Q$ normal and $P$ a $p$-group
May
10
comment $N_Q(R)=N_Q(Q\cap R)$ where $Q, R \le P$, $Q$ normal and $P$ a $p$-group
I don't see how $R$ would necessarily be normal if $N_Q(R)=Q$. Why can there not exists $x\in P\setminus Q$ such that $xRx^{-1} \neq R$?
May
10
asked $N_Q(R)=N_Q(Q\cap R)$ where $Q, R \le P$, $Q$ normal and $P$ a $p$-group
May
9
revised Prove that a counterexample exists without knowing one
added dollar signs
May
9
suggested suggested edit on Prove that a counterexample exists without knowing one
May
8
reviewed No Action Needed Ellipse in polar coordinates
May
8
reviewed No Action Needed Check if the number is a result of multiplying two fibonacci numbers
May
4
reviewed No Action Needed Riemann integrable on any subset of the plane
May
4
reviewed No Action Needed Vector Space-Linear Transformation (Multiple Choice)
May
2
suggested suggested edit on Representing four-dimensional pyramids
Apr
29
reviewed No Action Needed Why is it called a ring, a field?
Apr
29
reviewed No Action Needed Statistical Term for a Ratio of Percentages
Apr
25
comment Can an odd perfect number be divisible by $5313$?
@Anonymous-agroup I think Librecoin can answer that best!