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# Questions

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### Computer Science for Mathematicians

nov 3 at 10:33 Julien Puydt 1,1121716

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### A set for which it is hard to determine whether or not it is countable.

mar 27 11 at 8:24 Syang Chen 631210

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### The characteristic (indicator) function of a set is not in the Sobolev space H1

aug 26 10 at 6:12 Dorian 1,687318

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### Brownian motion, martingales, Markov Chains - Rosetta Stone

oct 4 10 at 14:33 Steven Heston 653411

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### Why is the harmonic oscillator so important? (pure viewpoint sought). How to motivate its role in Getzler’s work on Atiyah-Singer?

oct 10 11 at 13:26 Steve Sawin 27411

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### Why pi-systems and Dynkin/lambda systems? On the relative merits of approaches in measure theory.

aug 31 10 at 21:52 Nate Eldredge 5,7482448

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### Is the Lie algebra-valued curvature two-form on a principal bundle P the curvature of a vector bundle over P?

dec 2 11 at 18:32 Robert Bryant 21.8k37597

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### Inclusions of $C^{k,\alpha}$ spaces

oct 23 10 at 18:00 Hung Tran 1135

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### When is the group of homeomorphisms of a compact space locally compact?

dec 2 10 at 8:25 Pietro Majer 19.7k12469

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