Coproducts and the additivity of the Szymczak index
Tom 85 / 2005
Annales Polonici Mathematici 85 (2005), 211-226
MSC: Primary 37B30.
DOI: 10.4064/ap85-3-2
Streszczenie
We prove that the index defined by Szymczak in \cite{Sz} has an additivity property. Moreover we give an abstract theorem for extending coproducts from an initial category to the Szymczak category, which provides a setting for the proof of additivity.
