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# Questions

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### Is the tensor product of regular rings still regular

may 23 11 at 14:38 Tom Goodwillie 26.6k258110

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### How many primes stay inert in a finite (non-cyclic) extension of number fields?

jan 20 10 at 13:06 Mariano Suárez-Alvarez 30.6k768153

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### Maps inducing zero on homotopy groups but are not null-homotopic

apr 4 10 at 14:22 David Speyer 55k3102236

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### Looking for reference on Serre’s talk “linear rep and number of points mod p”

jun 17 at 15:29 Chandan Singh Dalawat 11.4k13973

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### Why the rank of a locally free sheaves is well defined?

jan 31 10 at 1:26 Martin Brandenburg 29.1k245129

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### Does reduced+Noetherian space imply Noetherian scheme

jan 30 11 at 15:35 ding8191 411

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### Some trivial questions on Tate’s conjectures

apr 29 11 at 4:16 Ying Zhang 66338

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### Lemmas on etale cohomology with compact support from the book ‘Arithmetic Duality Theorems’

may 24 at 21:05 SGP 2,614414

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### An exercise in group cohomology

apr 6 10 at 15:31 Ying Zhang 66338

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