In this paper, we define fusions on block extensions and partially extend some results of Puig on block fusion.Our main results are Propositions 2.0.7, 2.0.8, 2.0.11 and 2.0.12. In this paper, we define fusions on block extensions and partially extend some results of Puig on block fusion.Our main results are Propositions 2.0.7, 2.0.8, 2.0.11 and 2.0.12. 展开▼