ABSTRACT: We find the necessary and sufficient conditions on a coproduct of connected acts over a semigroup to be strongly hopfian. From this, we deduce the conditions of the strong hopfness for ...

A modern commutative diagram editor for the web.

ETH Zurich is home to many high-calibre scientists working diligently in their specialist fields. The numerous honours and awards that ETH researchers receive for their scientific work shows just how ...