Top network posts

• 199 Why do mathematicians use single-letter variables?
• 77 Examples where it's useful to know that a mathematical object belongs to some family of objects
• 66 Structures that turn out to exhibit a symmetry even though their definition doesn't
• 65 Can the fundamental group of any manifold be realized as the fund grp of a finite space?
• 57 How to prove that a polynomial of degree $n$ has at most $n$ roots?
• 42 Ring-theoretic characterization of open affines?
• 41 How did the refereeing system of Gösta Mittag-Leffler's Acta Mathematica function from 1882 to (about) 1918?
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