On Arithmetical Classes Not Closed Under Direct Union
- 1 October 1955
- journal article
- Published by JSTOR in Proceedings of the American Mathematical Society
- Vol. 6 (5) , 836-846
- https://doi.org/10.2307/2032943
Abstract
References [Enhancements On Off] (What's this?)Keywords
This publication has 2 references indexed in Scilit:
- On sentences which are true of direct unions of algebrasThe Journal of Symbolic Logic, 1951
- The decision problem for some classes of sentences without quantifiersThe Journal of Symbolic Logic, 1943