151

Questions
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What is an algebraic group over a noncommutative ring?

mar 8 10 at 16:47 Pete L. Clark 39.6k●3●102●225

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If the second derivative of a function on $\mathbb R^n$ is everywhere nondegenerate, does it follow that the first derivative is an injection?

apr 3 10 at 10:16 Thomas Kragh 1,360●4●12

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What is known about higher-categorical reconstruction theorems? (reference request)

aug 9 10 at 19:43 André Henriques 14.9k●2●30●83

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An explicit description of $\operatorname{gr}(k \cdot G)$ for the filtration induced by the augmentation ideal?

feb 18 11 at 17:17 Andreas Thom 13.1k●1●23●64

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How complicated is infinite-dimensional “undergraduate linear algebra”?

oct 25 10 at 17:22 Greg Kuperberg 36.3k●2●116●179

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Is the pairing between contours and functions perfect (modulo the kernel given by Stokes' theorem)?

mar 7 12 at 1:11 Tom Goodwillie 26.7k●2●58●110

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What functor is adjoint to the tensor product of 2-vector spaces?

apr 14 10 at 21:20 Reid Barton 14.4k●1●28●85

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Which functions are Wiener-integrable?

feb 26 10 at 3:31 userN 2,674●9●24

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Which is the correct universal enveloping algebra in positive characteristic?

jun 26 10 at 23:45 Chris 351●7

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When does an even-dimensional manifold fiber over an odd-dimensional manifold?

may 6 at 17:51 John Klein 7,216●19●28

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