✦ LIBER ✦

Primal extensions of universal algebras

✍ Scribed by R. Arthur Knoebel

Publisher: Springer-Verlag
Year: 1970
Tongue: French
Weight: 256 KB
Volume: 115
Category: Article
ISSN: 0025-5874
DOI: 10.1007/bf01109748

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We investigate internal groupoids and pseudogroupoids in varieties of universal algebras, and we give a new description of internal groupoids in congruence modular varieties. We then prove that in any congruence modular variety an algebraically central extension is categorically central. The convers