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100
Voted
RML
2006
123views Business» more  RML 2006»
15 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
76
Voted
RML
2006
130views Business» more  RML 2006»
15 years 11 days ago
Intensional Positive Set Theory
Roland Hinnion
122
Voted
RML
2006
134views Business» more  RML 2006»
15 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