Results 71 to 80 of about 69,338 (279)
Measure‐valued processes for energy markets
Mathematical Finance, Volume 35, Issue 2, Page 520-566, April 2025.Abstract We introduce a framework that allows to employ (non‐negative) measure‐valued processes for energy market modeling, in particular for electricity and gas futures. Interpreting the process' spatial structure as time to maturity, we show how the Heath–Jarrow–Morton approach can be translated to this framework, thus guaranteeing arbitrage free ...
Christa Cuchiero +3 more
wiley +1 more source
Green index in semigroups : generators, presentations and automatic structures
, 2012 The Green index of a subsemigroup T of a semigroup S is given by counting strong orbits in the complement S n T under the natural actions of T on S via right and left multiplication.
Ruskuc, Nik +4 more
core +1 more source
Cancellative and Malcev presentations for finite Rees index subsemigroups and extensions [PDF]
, 2008 It is known that, for semigroups, the property of admitting a finite presentation is preserved on passing to subsemigroups and extensions of finite Rees index.
Cain, Alan James +2 more
core +1 more source
Karpatsʹkì Matematičnì Publìkacìï, 2013 In this paper we study the semigroup $\mathcal{I}_{\,\infty}^{?\nearrow}(\mathbb{N})$ of partial co-finite almost monotone bijective transformations of the set of positive integers $\mathbb{N}$.
I. Ya. Chuchman, O. V. Gutik
doaj +1 more source
Semigroup C⁎-algebras and amenability of semigroups [PDF]
, 2011 We construct reduced and full semigroup C⁎-algebras for left cancellative semigroups. Our new construction covers particular cases already considered by A. Nica and also Toeplitz algebras attached to rings of integers in number fields due to J.
Xin Li
semanticscholar +1 more source
On the automorphisms of the power semigroups of a numerical semigroup
Transactions of the London Mathematical Society, Volume 13, Issue 1, December 2026.Abstract If H$H$ is a numerical semigroup (i.e., a cofinite subset of the non‐negative integers closed under addition), then the collection of all non‐empty subsets of H$H$ forms a semigroup P(H)$\mathcal {P}(H)$ under the sumset operation induced by addition in H$H$.
Salvatore Tringali, Kerou Wen
wiley +1 more source
N-Semigroups and their translation semigroups [PDF]
Journal of the Australian Mathematical Society, 1977 AbstractIfhis a homomorphism of anN-semigroup onto anN-semigroupS′, thenhinduces a homomorphismhof the translation semigroup Λ(S) ofSinto Λ(S′) ofS′. We will study the relations between the structures ofS,S′ and Λ(S), Λ(S)′, and will introduce the specialized concepts ofN-semigroupsS.
openaire +2 more sources
Maximal subgroups of free idempotent-generated semigroups over the full transformation monoid
, 2011 Let Tn be the full transformation semigroup of all mappings from the set {1, . . . , n} to itself under composition. Let E = E(Tn) denote the set of idempotents of Tn and let e ∈ E be an arbitrary idempotent satisfying |im (e)| = r ≤ n − 2. We prove that
Ruskuc, N. +3 more
core +1 more source
, 2022 This paper aims to study orbital maps in the context of semigroup actions on topological spaces and fiber bundles. It presents results on the behavior of the dynamical objects involved in the theories of attraction and Lyapunov stability under orbital ...
Rocha, Victor H. L. [UNESP] +1 more
core +1 more source