Results 51 to 60 of about 137 (87)
The cyclic and simplicial cohomology of the bicyclic semigroup algebra
Let = 1() be the semigroup algebra of , the bicyclic semigroup. We give a resolution of () which simplifies the computation of the cohomology of 1() dual bimodules.
White MC, Gourdeau F
core
Conditionally compact semitopological one-parameter inverse semigroups of partial isometries
, 1978 The algebraic structure of one-parameter inverse semigroups has been completely described. Furthermore, if B is the bicyclic semigroup and if B is contained in any semitopological semigroup, the relative topology on B is discrete. We show that if F is an
M. O. Bertman
core +1 more source
Inverse semigroups generated by group congruences. The Möbius functions
, 2013 The computation of the Möbius function of a Möbius category that arises from a combinatorial inverse semigroup has a distinctive feature. This computation is done on the field of finite posets.
Schwab, E.D.
core +1 more source
On monoids of injective partial cofinite selfmaps
, 2019 We study the semigroup ▫$mathscr{I}^{mathrm{cf}}_lambda$▫ of injective partial cofinite selfmaps of an infinite cardinal ▫$lambda$▫. We show that ▫$mathscr{I}^{mathrm{cf}}_lambda$▫ is a bisimple inverse semigroup and each chain of idempotents in ...
Repovš, Dušan, Gutik, Oleg
core +1 more source
On the semigroup of non-injective monoid endomorphisms of some extension of the bicyclic monoid
Pozdniakova I. On the semigroup of non-injective monoid endomorphisms of some extension of the bicyclic monoid / I. Pozdniakova, O. Gutik // Algebraic and geometric methods of analysis - 2024 : abstr. of the Intern. sci. conf., Odesa, 27-30 May - 2024 / [
Gutik, O., Pozdniakova, I.
core
Automatic semigroups : constructions and subsemigroups [PDF]
, 2018 In this thesis we start by considering conditions under which some standard semigroup constructions preserve automaticity. We first consider Rees matrix semigroups over a semigroup, which we call the base, and work on the following questions: (i) If the ...
Descalco, L.
core
Algebraic Characterization of Petri Nets
, 1979 Let Cn be the direct product of the bicyclic monoid C, taken n times, where n is a positive integer. It is shown that (1) every Petry net with n places can be represented by a finite subset of Cn represents a Petri net with n places, and (3) the firing ...
Kimura, Takayuki D.
core +1 more source
, 2013 Since they were first defined in the 1950's, projective covers (the dual of injective envelopes) have proved to be an important tool in module theory, and indeed in many other areas of abstract algebra.
Bailey, Alexander
core
A Class of Distal Functions on Semitopological Semigroups
, 2009 The norm closure of the algebra generated by the set {n→λ^nk : λ belongs T and k belongs N} of functions on (Z,+) was studied in [11] (and was named as the Weyl algebra).
Jabbari, A., Vishki, H.R.E.
core