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Hannes Thiel's user avatar
Hannes Thiel's user avatar
Hannes Thiel
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15 Answers

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11 votes

What spaces can be obtained from $\mathbb{R}^{n}$ by taking quotient spaces and subspaces?

9 votes

Is every maximal ideal in a C*-algebra always closed?

8 votes

Which C*-algebras are complemented in their bidual?

6 votes
Accepted

Finite codimensional subvector space of $C^{*}$ algebras which contains no invertible elements

6 votes

Almost idempotent approximate units in C*-algebras

4 votes
Accepted

Do c.p.c. order zero maps between local C*-algebras map C*-subalgebras to C*-subalgebras?

4 votes

Is the space of *-homomorphisms between two $C^*$-algebras locally path connected

4 votes

Classification of $C^*$ algebras whose all non scalar elements have disconnected spectrum

4 votes

connected stable rank

4 votes
Accepted

Local cross-sections for free actions of finite groups

4 votes

C$^*$-algebras isomorphic after tensoring

3 votes

The closure of selfadjoint elements of an algebra whose spectrum consist of rational numbers

2 votes

Transitivity of the Cuntz sub-equivalence

2 votes
Accepted

Totally non hereditary $C^{*}$-subalgebras

1 vote

All AI-algebras are AT-algebras