Computability, homotopy and twisted Cartesian products
نویسندگان
چکیده
منابع مشابه
On Computability Theoretic Properties of Structures and Their Cartesian Products
In this paper we show that for any set X ⊂ ω there exists a structure A that has no presentation computable in X such that A has a computable presentation. We also show that there exists a structure A with infinitely many computable isomorphism types such that A has exactly one computable isomorphism type.
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ژورنال
عنوان ژورنال: Proceedings of the American Mathematical Society
سال: 1990
ISSN: 0002-9939
DOI: 10.1090/s0002-9939-1990-0994794-8