Results 11 to 20 of about 4,735 (227)

A bivariant theory for the Cuntz semigroup [PDF]

open access: yesJournal of Functional Analysis, 2019
We introduce a bivariant version of the Cuntz semigroup as equivalence classes of order zero maps generalizing the ordinary Cuntz semigroup. The theory has many properties formally analogous to KK-theory including a composition product. We establish basic properties, like additivity, stability and continuity, and study categorical aspects in the ...
Bosa, Joan   +2 more
core   +8 more sources

Neutrosophic Left Almost Semigroup [PDF]

open access: yesNeutrosophic Sets and Systems, 2014
In this paper we extend the theory of neutrosophy to study left almost semigroup shortly LAsemigroup. We generalize the concepts of LA-semigroup to form that for neutrosophic LA-semigroup.
Mumtaz Ali   +3 more
doaj   +4 more sources

Semigroup theory applied to options

open access: yesJournal of Applied Mathematics, 2002
Black and Scholes (1973) proved that under certain assumptions about the market place, the value of a European option, as a function of the current value of the underlying asset and time, verifies a Cauchy problem.
D. I. Cruz-Báez   +1 more
doaj   +2 more sources

An example in the theory of hypercontractive semigroups [PDF]

open access: yesProceedings of the American Mathematical Society, 1985
Let \(L=xd^ 2/dx^ 2+(1-x)d/dx\) on smooth functions on (0,\(\infty)\) be the Laguerre operator.
Korzeniowski, Andrzej   +1 more
openaire   +2 more sources

Smarandache U-liberal semigroup structure [PDF]

open access: yes, 2009
In this paper, Smarandache U-liberal semigroup structure is given. It is shown that a semigroup S is Smarandache U-liberal semigroup if and only if it is a strong semilattice of some rectangular monoids. Consequently, some corresponding results on normal
Chen, Yizhi
core   +1 more source

Ergodic theory for quantum semigroups [PDF]

open access: yesJournal of the London Mathematical Society, 2014
21 pages. v2: minor changes.
Volker Runde, Ami Viselter
openaire   +3 more sources

Adjoint regular rings

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2002
Let R be a ring. The circle operation is the operation a∘b=a+b−ab, for all a,b∈R. This operation gives rise to a semigroup called the adjoint semigroup or circle semigroup of R. We investigate rings in which the adjoint semigroup is regular. Examples are
Henry E. Heatherly, Ralph P. Tucci
doaj   +1 more source

₷Ꝗ-Neutrosophic Structures in Semigroup Theory [PDF]

open access: yesNeutrosophic Sets and Systems
In this paper, we define and study a new fuzzy algebraic structure called ₷Ꝗ-neutrosophic fuzzy semigroups (₷Ꝗ-NFS) as a generalization of fuzzy algebra in the framework of ₷-semigroups.
Mala M, Mary Jansirani M
doaj   +1 more source

Representation of right zero semigroups and their semilattices by a transformation semigroup

open access: yesИзвестия высших учебных заведений. Поволжский регион: Физико-математические науки, 2022
Background. As is known, an arbitrary semigroup can be represented by a semigroup of transformations that are right shifts either in this semigroup itself or in the extended semigroup obtained from the original one by adding an outer unit. The problems
L.V. Zyablitseva   +2 more
doaj   +1 more source

Attractivity for Hilfer fractional stochastic evolution equations

open access: yesAdvances in Difference Equations, 2020
This article is devoted to the study of the attractivity of solutions to a class of stochastic evolution equations involving Hilfer fractional derivative.
Min Yang   +3 more
doaj   +1 more source

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