New posts in C Star Algebras

Proof of Glimm's Lemma

Why does a unitary in the Calkin algebra always lift to an (co-)isometry?

Spectrum of projection

Ideal in $C(X)$

Square root is operator monotone

Must there always be a normal element with non-discrete spectrum in an infinite-dimensional C*-algebra?

A question about pure state

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

Two inequalities in $C^*$ algebras

Endomorphisms of the Cuntz algebra