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What was the relative importance of FLT vs. higher reciprocity laws in Kummer’s invention of algebraic number theory?

aug 7 10 at 19:08 Bill Dubuque 2,168●13●20

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Does (the ideal class of) the different of a number field have a canonical square root?

jan 22 11 at 14:53 Emerton 39k●4●120●198

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Have people successfully worked with the full ring of diferential operators in characteristic p?

jan 13 12 at 13:17 Lars 2,625●2●12●22