Canonical subgroups via Breuil-Kisin modules for p=2
Abstract
Let p be a rational prime and K/Qp be an extension of complete discrete valuation fields. Let G be a truncated Barsotti-Tate group of level n, height h and dimension d over OK with 0<d<h. In this paper, we prove the existence of higher canonical subgroups with expected properties for G if the Hodge height of G is less than 1/(pn-2(p+1)), including the case of p=2.
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