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That is, each return time set is a so-called syndetic subset ofT= the positive reals (continuous time system) or T = the positive integers (discrete time system). In particular, frequency is measured by membership in a family of subsets of the space modeling time, in this case the family of syndetic subsets of T.

Intuitionistic logic is presented here as part of familiar classical logic which allows mechanical extraction of programs from proofs.

Problems in Set Theory, Mathematical Logic and the Theory of Algorithms by I. It covers major classical topics in proof theory and the semantics of propositional and predicate logic as well as set theory and computation theory.

His friends in China have also established a Zhong Jia-Qing Memorial Fund, which has since twice awarded the Zhong Jia-Qing prizes for Chinese mathematics graduate students. In addition to putting Zhong's mathematical contributions in perspective, these articles should be useful also to a large segment of the mathematical community;

Intuitionistic logic is presented here as part of familiar classical logic which allows mechanical extraction of programs from proofs.

This book is a translation of my book Suron Josetsu (An Introduction to Number Theory), Second Edition, published by Shokabo, Tokyo, in 1988.