Top network posts
- 25How can I prove that $xy\leq x^2+y^2$?
- 22Why doesn't LaTeX interpret `(` as `\left(` and `)` as `\right)`?
- 12Prove that the additive group $ℚ$ is not isomorphic with the multiplicative group $ℚ^*$.
- 8Let $σ∈S_n$ be a $n$ cycle. Prove that an element $τ∈S_n$ only commutes with $σ$ if $τ$ is a power of $σ$.
- 6Let $G$ a group of order $6$. Prove that $G \cong \Bbb Z /6 \Bbb Z$ or $G \cong S_3$.
- 5When does pointwise convergence on $[a,b]$ imply uniform convergence on $[a,b]$
- 5Let $\sigma,\tau \in S_n$. Prove that $\sigma \tau$ and $\tau \sigma $ have the same cycle type.
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