Erratum: Nilpotency, radicals and monoidal structures (Q833483)

This erratum of [Rend. Semin. Mat. Univ. Padova 108, 107--290 (2002; Zbl 1165.18300)] is concerned with some small corrections and two serious ones. Firstly, the statement of Corollary 16.1.b.(ii) is wrong (though it is not used in the rest of the paper). Second, there are errors in the proof of Proposition 8.1.1.b (and hence, also in the proof of Theorem 8.2.2.a). While it is still unclear whether these staements hold, the authors prove a very close variation of Theorem 8.2.2.