The Ext group in the categories of topological abelian groups and topological vector spaces

Hugo J. Bello

This paper is devoted to the study of the group $\mathrm{Ext}(G,H)$ of all extensions of topological abelian groups $0\to H\to X\to G\to 0$ and the group ${\mathrm{Ext}}_{TVS}(Z,Y)$ of a…