Accessible embeddings and the solution-set condition
H. Hu, M. Makkai (1994)
Cahiers de Topologie et Géométrie Différentielle Catégoriques
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H. Hu, M. Makkai (1994)
Cahiers de Topologie et Géométrie Différentielle Catégoriques
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Borceux, F., Quinteiro, C., Rosický, J. (1998)
Theory and Applications of Categories [electronic only]
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Jiří Adámek, Jiří Rosický (1989)
Archivum Mathematicum
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Karazeris, Panagis (2001)
Theory and Applications of Categories [electronic only]
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G. M. Kelly (1986)
Cahiers de Topologie et Géométrie Différentielle Catégoriques
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G. M. Kelly (1982)
Cahiers de Topologie et Géométrie Différentielle Catégoriques
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Marco Riccardi (2015)
Formalized Mathematics
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The main purpose of this article is to introduce the categorical concept of pullback in Mizar. In the first part of this article we redefine homsets, monomorphisms, epimorpshisms and isomorphisms [7] within a free-object category [1] and it is shown there that ordinal numbers can be considered as categories. Then the pullback is introduced in terms of its universal property and the Pullback Lemma is formalized [15]. In the last part of the article we formalize the pullback of functors...
Krause, Henning (2001)
Documenta Mathematica
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