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British building projects for Wilo Salmson

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
297 KB
Volume
1999
Category
Article
ISSN
0262-1762

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A projection property for buildings
A projection property for buildings
โœ Herbert Abels ๐Ÿ“‚ Article ๐Ÿ“… 1998 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 528 KB

An object X of a category is said to have the projection property if the only idempotent morphisms f : X x X + X are the projections. Here a morphism f : X x X + X is called idempotent if f 0 d = id for the diagonal map A :X --+ X x X.