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RML
2006
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14 years 11 days ago
Some Results on Ordered Structures in Toposes
Abstract. A topos version of Cantor's back and forth theorem is established and used to prove that the ordered structure of the rational numbers Q, < is homogeneous in any ...
Luís A. Sbardellini, Marcelo E. Coniglio
RML
2006
134views Business» more  RML 2006»
14 years 11 days ago
A Note on Transitive Sets without the Foundation Axiom
We construct a model of set theory without the foundation axiom in which there exists a transitive set whose intersection is not transitive.
Marcin Kysiak