Results 11 to 20 of about 233 (46)
Partial maps with domain and range: extending Schein's representation [PDF]
, 2009 The semigroup of all partial maps on a set under the operation of composition admits a number of operations relating to the domain and range of a partial map. Of particular interest are the operations R and L returning the identity on the domain of a map
Jackson, Marcel, Stokes, Tim E.
core +2 more sources
Unary enhancements of inherently nonfinitely based semigroups [PDF]
, 2013 We exhibit a simple condition under which a finite involutary semigroup whose semigroup reduct is inherently nonfinitely based is also inherently nonfinitely based as a unary semigroup.
Auinger, Karl +3 more
core +1 more source
Hopf and Lie algebras in semi-additive Varieties [PDF]
, 2017 We study Hopf monoids in entropic semi-additive varieties with an emphasis on adjunctions related to the enveloping monoid functor and the primitive element functor.
Porst, Hans-E.
core +2 more sources
Almost structural completeness; an algebraic approach [PDF]
, 2014 A deductive system is structurally complete if its admissible inference rules are derivable. For several important systems, like modal logic S5, failure of structural completeness is caused only by the underivability of passive rules, i.e. rules that can
M. Stronkowski, Michał, Wojciech Dzik
core
Some properties of pseudo-BCK- and pseudo-BCI-algebras
, 2018 Pseudo-BCI-algebras generalize both BCI-algebras and pseudo-BCK-algebras, which are a non-commutative generalization of BCK-algebras. In this paper, following [J.G. Raftery and C.J. van Alten, Residuation in commutative ordered monoids with minimal zero,
Emanovský, Petr, Kühr, Jan
core +1 more source
, 2003 In the paper we consider the notion of hyper-quasi-identities and hyperquasivarieties as a generalization of the concept of quasi-identity and quasivariety invented by A. I.
Graczynska, Ewa, Schweigert, Dietmar
core +2 more sources
Naturally dualizable algebras omitting types 1 and 5 have a cube term
, 2015 An early result in the theory of Natural Dualities is that an algebra with a near unanimity (NU) term is dualizable. A converse to this is also true: if V(A) is congruence distributive and A is dualizable, then A has an NU term.
Moore, Matthew
core +1 more source
Algebraosztályok és klónok = Classes of algebras and clones [PDF]
, 2010 Főbb eredményeink a következők. Beláttuk, hogy többségi kifejezésfüggvény létezése eldönthető véges algebrákra. Igazoltuk, hogy bármely nem-triviális idempotens Malcev-feltételt teljesítő véges algebrának van gyenge többségi kifejezésfüggvénye, és 2 ...
B. Szendrei, Mária +7 more
core
Behavior of Quillen (co)homology with respect to adjunctions
, 2014 This paper aims to answer the following question: Given an adjunction between two categories, how is Quillen (co)homology in one category related to that in the other? We identify the induced comparison diagram, giving necessary and sufficient conditions
Frankland, Martin
core +1 more source
Admissibility in De Morgan algebras [PDF]
, 2018 Characterizations of admissible quasi-identities, which may be understood as quasi-identities holding in free algebras on countably infinitely many generators, are provided for classes of De Morgan algebras and ...
Metcalfe, George +1 more
core