How can I prove that $xy\leq x^2+y^2$?
asked Apr 10 at 16:25
Why doesn't LaTeX interpret `(` as `\left(` and `)` as `\right)`?
asked Nov 2 at 3:40
Prove that the additive group $ℚ$ is not isomorphic with the multiplicative group $ℚ^*$.
asked Mar 19 at 11:52
Let $σ∈S_n$ be a $n$ cycle. Prove that an element $τ∈S_n$ only commutes with $σ$ if $τ$ is a power of $σ$.
asked Mar 19 at 11:58
When does pointwise convergence on $[a,b]$ imply uniform convergence on $[a,b]$
asked Mar 6 at 21:41
Let $\sigma,\tau \in S_n$. Prove that $\sigma \tau$ and $\tau \sigma $ have the same cycle type.
asked Mar 19 at 15:51
Let $G$ a group of order $6$. Prove that $G \cong \Bbb Z /6 \Bbb Z$ or $G \cong S_3$.
asked Mar 31 at 17:25
No answers with score of 5 or more