Top network posts

• 52 Is Pythagoras the only relation to hold between $\cos$ and $\sin$?
• 23 Is quotient of a ring by a power of a maximal ideal local?
• 19 Does Nakayama Lemma imply Cayley-Hamilton Theorem?
• 18 Let $n$ be an integer greater than $1$. In a ring in which $x^n = x$ for all $x$, show that $ab=0$ implies $ba = 0$.
• 17 Quotient of polynomials, PID but not Euclidean domain?
• 16 Integral domain with a finitely generated non-zero injective module is a field
• 15 Is $R$ a PID if every submodule of a free $R$-module is free?
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