Souvenirs from Timisoara: an invariant subspace theorem and a solution of an open problem of McCarthy and Shalit

A couple of weeks ago I attended the 30th International Conference in Operator Theory, that took place at West University in Timisoara, Romania. This is a longstanding series of conferences in operator theory and related fields that takes place every other year in Romania which has been traditionally a powerhouse in operator theory (Stratila, Voiculescu, [ ]