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“REPEATERS” CLASSES IN ALGEBRA

✍ Scribed by Jos. A. Nyberg

Book ID
114963630
Publisher
School Science and Mathematics Association
Year
1923
Tongue
English
Weight
327 KB
Volume
23
Category
Article
ISSN
0036-6803

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✍ Gregory L. McColm 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 367 KB

## Abstract It is known that for two given countable sets of unary relations __A__ and __B__ on ω there exists an infinite set __H__ ⫅ ω on which __A__ and __B__ are the same. This result can be used to generate counterexamples in expressibility theory. We examine the sharpness of this result.