25 Answers votes newest views recent 5A theorem of Stickelberger on the number of prime ideals in a decomposition 0Classes of fields and Cantor-Schröder-Bernstein 1Good book on Riemann surfaces and Galois theory? 2Reference for representation theory of SL_2(Z/n) 5Introductory reading on the Scholz reflection principle? 5What elementary problems can you solve with schemes? 4One point in the post of Terence Tao on Ax-Grothendieck theorem 6Unique factorisation and the fact that $\mathbb A^2-0$ is not an affine variety? 2Subgroups of groups of Square-free order 2Splitting of primes in cubic fields with limited ramifications. 1applications of Tate-Poitou duality 8Explicit map for Scholz reflection principle 1Faithful characters of finite groups 35Theorems with unexpected conclusions (2) 4Families of number fields of prime discriminant 2Local-globalism for similar matrices? 43Favorite popular math book (2) 3Weierstrass points on rigid-analytic surfaces 1Factorization of elements vs. of ideals, and is being a UFD equivalent to any property which can be stated entirely without reference to ring elements? 12Statements in group theory which imply deep results in number theory (2) 2When can we prove constructively that a ring with unity has a maximal ideal? 5What is the first interesting theorem in (insert subject here)? 3How do we study Iwasawa theory? 3Can a non-surjective polynomial map from an infinite field to itself miss only finitely many points? 7What’s the “best” proof of quadratic reciprocity?