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Principal Congruences of Pseudocomplemented Demorgan Algebras

✍ Scribed by Hanamantagouda P. Sankappanavar

Publisher
John Wiley and Sons
Year
1987
Tongue
English
Weight
460 KB
Volume
33
Category
Article
ISSN
0044-3050

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πŸ“œ SIMILAR VOLUMES

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✍ Hernando GaitΓ‘n πŸ“‚ Article πŸ“… 1998 πŸ› John Wiley and Sons 🌐 English βš– 622 KB

In this paper we characterize the join irreducible elements of the free algebras on n free generators in the subvarieties of the variety VO of pseudocomplemented De Morgan algebras satisfying the identity zz'\* = (zz'\*)'\*.

Principal Congruence Subgroups of the He
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✍ Mong-Lung Lang; Chong-Hai Lim; Ser-Peow Tan πŸ“‚ Article πŸ“… 2000 πŸ› Elsevier Science 🌐 English βš– 126 KB

Let q be an odd integer >3 and let G q be the Hecke group associated to q. Let ({) be a prime ideal of Z[\* q ] and G(q, {) the principal congruence subgroup of G q associated to {. We give a formula for [G q : G(q, {)], the index of the principal congruence subgroup G(q, {) in G q . We also give fo