New posts in Operator Algebras

Does a $\mathrm{C}^*$-algebra generated by projections contain support projections

Homotopy between idempotents of small difference

Commutative unital Banach algebra not isomorphic to $C(X)$ for some compact Hausdorff space $X$

Is the limit of the spectral radius the spectral radius of the limit?

Suppose $A,B$ are positive operators with $AB=0$,what is the norm of $A+B$?

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

Inequality related to spectral radius

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

Proof of Glimm's Lemma

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