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Esquisses des categories √† limites et des quasi-topologies. (French) Zbl 0395.18005
Esquisses Mathematiques. No. 5. Amiens: Charles Ehresmann. 83 p. (1970).

MSC:
18D99 Categorical structures
18A40 Adjoint functors (universal constructions, reflective subcategories, Kan extensions, etc.)
18A30 Limits and colimits (products, sums, directed limits, pushouts, fiber products, equalizers, kernels, ends and coends, etc.)
18A05 Definitions and generalizations in theory of categories
18A10 Graphs, diagram schemes, precategories