Top network posts

• 90 Easy example why complex numbers are cool
• 66 Polynomials irreducible over $\mathbb{Q}$ but reducible over $\mathbb{F}_p$ for every prime $p$
• 44 How to prove that the sum and product of two algebraic numbers is algebraic?
• 40 If $H$ is a cyclic subgroup of $G$ and $H$ is normal in $G$, then every subgoup of $H$ is normal in $G$.
• 26 How to find pattern in $1,2,8,9,15,20,26,38....$ infinite sequence?
• 22 Proof that determinant rank equals row/column rank
• 20 If the tensor power $M^{\otimes n} = 0$, is it possible that $M^{\otimes n-1}$ is nonzero?
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