New posts in c-star-algebras

In a C*-algebra, put $a^*a \sim aa^*$. Transitivity fails?

operator-theory c-star-algebras

Showing that $\lim \sup\limits_{\gamma} \left \|a - a e_{\gamma} \right \| \leq \|a - b\|$ for all $a \in A$ and $b \in J.$

ideals operator-algebras c-star-algebras

Showing that $A/J \cong \mathbb C.$

ideals operator-algebras c-star-algebras quotient-spaces maximal-and-prime-ideals

The set of all normal operators on a Hilbert space is not strongly closed

functional-analysis operator-theory c-star-algebras

Show that $\phi$ and $\psi$ are not equivalent.

operator-algebras c-star-algebras

What is the commutative analogue of a $C^*$-subalgebra?

functional-analysis noncommutative-geometry c-star-algebras

Extending a $C^*$-algebras morphism to the multipliers

functional-analysis operator-algebras c-star-algebras

If a sub-C*-algebra does not contain the unit, is it contained in a proper ideal?

ring-theory examples-counterexamples c-star-algebras

Showing invertibility of bounded operators.

hilbert-spaces operator-algebras c-star-algebras

Can $ {L^{1}}(G) $ be a $ C^{*} $-algebra?

functional-analysis lp-spaces c-star-algebras banach-algebras

C$^{*}$-algebra acting irreducibly on the finite-dimensional space $\mathbb{C}^{n}$ must be $M_{n}(\mathbb{C})$

functional-analysis operator-theory representation-theory operator-algebras c-star-algebras

C* Algebra textbook recommendation

analysis functional-analysis reference-request c-star-algebras

Sufficient condition for a *-homomorphism between C*-algebras being isometric

functional-analysis operator-algebras c-star-algebras

K-theory for non-separable C*-algebras

operator-algebras c-star-algebras topological-k-theory k-theory

Square root is operator monotone

linear-algebra functional-analysis operator-theory c-star-algebras

Computing $K$ - theory groups of certain $C^{\ast}$- algebras

c-star-algebras k-theory

Extension of character in Banach algebras

functional-analysis harmonic-analysis banach-algebras c-star-algebras

normal elements in spectral theory.

functional-analysis operator-theory spectral-theory c-star-algebras

Upper-triangular matrix is invertible iff its diagonal is invertible: C*-algebra case

linear-algebra abstract-algebra matrices c-star-algebras

In how far are CCR and GCR C*-algebras interesting?

operator-algebras c-star-algebras