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yannickvda
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Primes of the form $x^2+ny^2$ and congruences.
Jul 12, 2014
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$\mathbb{Q}(i)$ has no unramified extensions
11
cohomological proof of Maschke's theorem
11
Learning about Grothendieck's Galois Theory.
7
homeomorphism $\Rightarrow$ isomorphism ? (counterexample, Hartshorne exercise 3.2)