Top network posts

• 92 Easy example why complex numbers are cool
• 69 Polynomials irreducible over $\mathbb{Q}$ but reducible over $\mathbb{F}_p$ for every prime $p$
• 48 If $H$ is a cyclic subgroup of $G$ and $H$ is normal in $G$, then every subgoup of $H$ is normal in $G$.
• 27 How to find pattern in $1,2,8,9,15,20,26,38....$ infinite sequence?
• 24 Proof that determinant rank equals row/column rank
• 20 $x^a - 1$ divides $x^b - 1$ if and only if $a$ divides $b$
• 20 Description of Levi factors and unipotent radicals of parabolic subgroups in classical groups
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