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# Questions

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### Is the set of primes “translation-finite”?

nov 19 09 at 6:22 Yemon Choi 8,45611944

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### Approximating operators on Banach spaces by bounded operators on a proper dense subspace

jul 11 10 at 11:35 Bill Johnson 14.4k13360

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### Groups of order $n$ with a character whose degree is at least $0.8\sqrt{n}$ (say)

jun 23 11 at 23:15 Geoff Robinson 9,91612127

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### Closed, complemented subspaces of $l^1(X)$ when $X$ is uncountable

dec 13 09 at 21:37 Bill Johnson 14.4k13360

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### Can we bound degrees of complex irreps in terms of the average conjugacy class size?

apr 30 11 at 7:27 Geoff Robinson 9,91612127

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### Source needed (at final-year undergrad level) for the double cover of SO(3) by SU(2)

jan 17 10 at 0:36 Harry Gindi 8,87823396

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### “Explicit” embedding of $\ell^1$ as a closed subalgebra of a direct sum of matrix algebras

dec 18 10 at 10:31 Mikael de la Salle 3,456516

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### Does left-invertible imply invertible in full group C*-algebras (discrete case)?

oct 28 11 at 7:31 Andreas Thom 13.1k12364

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### Reference request for two-generator subgroups of a free group

sep 26 10 at 3:47 Yemon Choi 8,45611944

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