Algebra of M-Solid Quasivarieties

Quasivarieties are classes of algebras of the same type, which are defined by sets of implications. Equivalently, a class of algebras of the same type is a quasivariety if it is isomorphically and multiplicatively closed, closed under ultraproducts, hereditary and contains a trivial algebra. Quasivarieties became much more important when it turned out that they are the appropriate classes of algebras to algebraize logical calculi. The study of all subquasivarieties of a given variety is a challenging problem. Unfortunately, little is known about the lattice of all subquasivarieties of a given quasivariety. The theory of hyperidentities (hyperquasi-identities) and hypersubstitutions, to which the author of this monograph contributed a lot in the past twenty years, is offering such methods. For each submonoid M of the monoid of all hypersubstitutions of a given type, M-solid varieties and M-solid quasivarieties were invented in order to consider a complete sublattice of the lattice of all subvarieties and subquasivarieties, respectively. The concept of an M-derived algebra and an M-derived quasivariety is a useful tool. Some of the concepts were invented by the author and collaborators. The Birkhoff-type characterization of M-hypervarieties and M-hyperquasivarieties is presented. Some newer ideas concern the description of the derivation concepts of M-hyperequational and M-hyperquasi-equational logic. The solution of the M-hyperbasis and M-hyperquasi-basis is given. Results of an M-dimension of a variety are also presented.

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  • Συγγραφέας:
  • Εκδότης: Εκδόσεις Σιάτρα
  • Μορφή: Μαλακό εξώφυλλο
  • Έτος έκδοσης: 2014
  • Αριθμός σελίδων: 204
  • Κωδικός ISBN: 6188111803
  • Διαστάσεις: 24×17
  1. Algebra of M-Solid Quasivarieties

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  2. Algebra of M-Solid Quasivarieties

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