List questions from operator-algebras

Published on 11 Nov 2017 - 14:31

71

Views

If $Sx\neq0$. Why $S^{1/2}Sx \neq0$? where $S\geq0$.

Published on 13 Nov 2017 - 11:46

425

Views

Does there exist a non-commutative $C^*$-algebra which does not contain a completely isometric copy of $M_n$ for any $n>1$?

Published on 23 Feb 2026 - 6:39

1.9k

Views

Cannot find a matrix sign (A+) anywhere

Published on 15 Nov 2017 - 1:18

34

Views

If $W_0(U^T_1U,U^T_2U)= \emptyset$. Why $W_0(T_1,T_2)= \emptyset$?Where $U$ is unitary operator.

Published on 15 Nov 2017 - 5:21

98

Views

$M_n(B(H))$ is * isomorphic to $B(H^{(n)})$

Published on 15 Nov 2017 - 5:48

104

Views

Is the inverse of an adjointable Hilbert module operator always adjointable?

Published on 15 Nov 2017 - 15:53

55

Views

$H\otimes l^{2}(\Gamma)\cong\bigoplus\limits_{g\in \Gamma}H$

Published on 18 Nov 2017 - 15:57

65

Views

Concerning Whether a Certain Property of the Trace is Preserved Under $*$-homomorphisms.

Published on 01 Apr 2026 - 23:46

350

Views

If $M\geq0$. Why $\overline{\text{Im}(M)}=\text{Im}(M)\Leftrightarrow \text{Im}(M)=\text{Im}(M^{1/2}) $?

Published on 19 Nov 2017 - 17:53

52

Views

vector states from elementary tensors $h\otimes k\in H\otimes K$ separate all of $\mathbb{B}(H\otimes K)$

Published on 07 Apr 2026 - 1:17

411

Views

GNS construction: Finding a representation

Published on 20 Nov 2017 - 17:50

67

Views

$(AB)^p =A^p B^p$?

Published on 24 Feb 2026 - 5:31

243

Views

Generalizing trace from positive to trace class operators

Published on 01 Apr 2026 - 23:37

289

Views

Image of a W-Algebra under an injective -homomorphism

Published on 30 Mar 2026 - 4:21

List Question

Interchanging differential operator and integral sign for Sobolev spaces

If $Sx\neq0$. Why $S^{1/2}Sx \neq0$? where $S\geq0$.

Does there exist a non-commutative $C^*$-algebra which does not contain a completely isometric copy of $M_n$ for any $n>1$?

Cannot find a matrix sign (A+) anywhere

If $W_0(U^T_1U,U^T_2U)= \emptyset$. Why $W_0(T_1,T_2)= \emptyset$?Where $U$ is unitary operator.

$M_n(B(H))$ is * isomorphic to $B(H^{(n)})$

Is the inverse of an adjointable Hilbert module operator always adjointable?

$H\otimes l^{2}(\Gamma)\cong\bigoplus\limits_{g\in \Gamma}H$

Concerning Whether a Certain Property of the Trace is Preserved Under $*$-homomorphisms.

If $M\geq0$. Why $\overline{\text{Im}(M)}=\text{Im}(M)\Leftrightarrow \text{Im}(M)=\text{Im}(M^{1/2}) $?

vector states from elementary tensors $h\otimes k\in H\otimes K$ separate all of $\mathbb{B}(H\otimes K)$

GNS construction: Finding a representation

$(AB)^p =A^p B^p$?

Generalizing trace from positive to trace class operators

Image of a W-Algebra under an injective -homomorphism

Trending Questions

Popular # Hahtags

Popular Questions