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# Questions

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

nov 19 09 at 6:22 Yemon Choi 8,44611944

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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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### 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 9,85612127

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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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### Invertibility of a certain matrix indexed by the Hamming cube

mar 9 at 2:02 Brendan McKay 9,12011333

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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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### A left inverse for the comultiplication on a Hopf von Neumann algebra

nov 30 11 at 9:41 Matthew Daws 5,4891828

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### Is the space of Hankel operators complemented in B(H)?

nov 16 11 at 20:50 Yemon Choi 8,44611944

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### Can we find arbitrarily many elements of SU(2) generating a good copy of MAX($\ell_1^n$) inside VN(SU(2))?

oct 24 at 14:30 Yemon Choi 8,44611944

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