Finite subgroups of formal groups

[摘要] We discuss various moduli problems involving the classification of finite subgroups or related structures on formal groups of finite height n. We show that many moduli schemes are smooth or at least Cohen-Macaulay. Moreover, many maps between such schemes are finite and flat, and their degrees can be predicted by thinking of (Q(p)/Z(p))(n) as a ''discrete model'' for the formal group. (C) 1997 Elsevier Science B.V.

[发布日期] 1997-09-25