Leonel Robert's user avatar
Leonel Robert's user avatar
Leonel Robert's user avatar
Leonel Robert
  • Member for 11 years, 11 months
  • Last seen more than a week ago
17 votes
Accepted

Is there a proof that the $C^{*}$-algebras don't see the invariant subspace problem?

16 votes
Accepted

C$^*$-algebras isomorphic after tensoring with $M_n(\mathbb C)$

15 votes

Question about hereditary $C^*$-algebra

10 votes

Commutators in the reduced C*-algebra of the free group

8 votes

Invertible operator with countable spectrum

8 votes
Accepted

Algebraic $K_1$ group for a $C^*$-algebra

7 votes
Accepted

Prove an equality related to a tuple of operators

7 votes
Accepted

Completely positive maps as "positive operators"

6 votes
Accepted

When do tensor products of C*-algebras commute with colimits?

6 votes

What are known examples of positive but not completely positive maps?

6 votes
Accepted

Proper morphisms of C*-algebras / Nondegenerate representations

6 votes
Accepted

A perturbation question for the intersection of C*-subalgebras

6 votes

how to find/define eigenvectors as a continuous function of matrix?

6 votes

When does a $C^*$-algebra have no nonzero projection?

5 votes
Accepted

Is there an upper bound on the dimension for irreducible representations of a continuous trace $C^{*} $-algebra?

4 votes
Accepted

rank of fin gen projective modules over C* algebras

4 votes

positive element in C* tensor product

4 votes
Accepted

Is the unitary group of $l^2(A)$ with the strict topology contractible?

4 votes
Accepted

When are countably generated Hilbert modules generated by c.p.c. order zero maps?

3 votes
Accepted

The saturation of Murray von Neumann relation

3 votes
Accepted

Is this left ideal of C*-algebra principal?

3 votes

NonCommutative Baire theorem

3 votes
Accepted

$R$ is a right multiplier and $R(a)b=a\overset{?}{\implies} A$ is unital

3 votes
Accepted

Induced map of an approximately inner automorphism on the multiplier algebra of $A\otimes\mathcal{K}$

3 votes
Accepted

Subprojections of the sum of mutually orthogonal Abelian projections

3 votes
Accepted

Is restriction to the center an open map?

2 votes
Accepted

Simple $C^*$ algebras with invariant subspace property

1 vote

How rich the group of unitary elements in a von Neumann algebra to get "Murray-von Neumann" equivalence?