Results 81 to 90 of about 3,353 (149)

Regular Functors and Relative Realizability Categories [PDF]

open access: yes, 2011
Relative realizability toposes satisfy a universal property that involves regular functors to other categories. We use this universal property to define what relative realizability categories are, when based on other categories than of the topos of sets.
Stekelenburg, Wouter Pieter
core  

Covers of the arithmetic site

open access: yes, 2016
We give an explicit description of the Barr- and Diaconescu covers of the arithmetic site, which are relevant to cohomology. Further, we construct the arithmetic site as the commutative shadow of a non-commutative topological ...
Bruyn, Lieven Le
core  

Finitely Presented Heyting Algebras

open access: yesBRICS Report Series, 1998
In this paper we study the structure of finitely presented Heyting<br />algebras. Using algebraic techniques (as opposed to techniques from proof-theory) we show that every such Heyting algebra is in fact co- Heyting, improving on a result of Ghilardi who showed that Heyting algebras free on a finite set of generators are co-Heyting.
openaire   +2 more sources

Injective and projective Heyting algebras [PDF]

open access: yesTransactions of the American Mathematical Society, 1970
Balbes, Raymond, Horn, Alfred
openaire   +1 more source

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