A \(C^*\)-algebra \(\mathcal A\) for which Ext (\(\mathcal A\)) is not a group. (English) Zbl 0378.46057
MSC:
46L05 | General theory of \(C^*\)-algebras |
18G15 | Ext and Tor, generalizations, Künneth formula (category-theoretic aspects) |
46L05 | General theory of \(C^*\)-algebras |
18G15 | Ext and Tor, generalizations, Künneth formula (category-theoretic aspects) |