Top network posts

• 18 The Best of Dover Books (a.k.a the best cheap mathematical texts)
• 18 Method to test if a number is a perfect power?
• 11 Reference to self-study Abstract Algebra and Category Theory
• 9 Mind-blowing mathematics experiments
• 9 How did Euler prove the Mersenne number $2^{31}-1$ is a prime so early in history?
• 9 Is there a positive integer $n$ such that the prime divisors of $n^3 - 1$ are $2$, $3$ and $7$?
• 7 Showing that $S^1 \times \left\{\pm 1 \right\}$ is not isomorphic to $O(2)$
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