β Scribed by A. G. Chentsov
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π SIMILAR VOLUMES
This paper studies filters on subsets of x which behave like ultrafilters on certain definable over L, subsets of an ordinal x 2 w. In particular it examines A,, IT, and 2, ultrafilters on subsets of x . The major result of section 2, theorem 2.4, is due to M. KAUFMAKK (151, theorem 1). However the
We consider the problem of controlling the state of a two-level quantum system (quantum bit) via an externally applied electro-magnetic ΓΏeld. The describing model is a bilinear right-invariant system whose state varies on the Lie group of 2 Γ 2 special unitary matrices. We study the topological stru
Building sets are a successful tool for constructing semi-regular divisible difference sets and, in particular, semi-regular relative difference sets. In this paper, we present an extension theorem for building sets under simple conditions. Some of the semi-regular relative difference sets obtained