Results 71 to 80 of about 292 (185)
On certain lattice—Ordered semigroups
Semigroup Forum, 1985 The aim of this paper is the introduction and the initial study of a lattice-ordered semigroup S which satisfies \(ab=(a\vee b)(a\wedge b)\) for all a,b\(\in S\). This axiom is of course a well-known theorem of the classical theory of divisibility over commutative and cancellative semigroups.
Ciobanu, G., Deaconescu, M.
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The Canadian Journal of Chemical Engineering, Volume 104, Issue 6, Page 3018-3037, June 2026.Abstract We develop a delay‐aware estimation and control framework for a non‐isothermal axial dispersion tubular reactor modelled as a coupled parabolic‐hyperbolic PDE system with recycle‐induced state delay. The infinite‐dimensional dynamics are preserved without spatial discretization by representing the delay as a transport PDE and adopting a late ...
Behrad Moadeli, Stevan Dubljevic
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On representable ordered residuated semigroups [PDF]
Logic Journal of IGPL, 2010 We show that the equational theory of representable lattice-ordered residuated semigroups is not finitely axiomatizable. We apply this result to the problem of completeness of substructural logics.
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Long‐Time Solvability and Asymptotics for the 3D Rotating MHD Equations
Mathematische Nachrichten, Volume 299, Issue 6, Page 1480-1509, June 2026.ABSTRACT We consider the initial value problem for the 3D incompressible rotating MHD equations around a constant magnetic field. We prove the long‐time existence and uniqueness of solutions for small viscosity coefficient and high rotating speed. Moreover, we investigate the asymptotic behavior of solutions in the limit of vanishing viscosity and fast
Hiroki Ohyama
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From Stability to Chaos: A Complete Classification of the Damped Klein‐Gordon Dynamics
Mathematical Methods in the Applied Sciences, Volume 49, Issue 9, Page 9696-9708, June 2026.ABSTRACT We investigate the transition between stability and chaos in the damped Klein‐Gordon equation, a fundamental model for wave propagation and energy dissipation. Using semigroup methods and spectral criteria, we derive explicit thresholds that determine when the system exhibits asymptotic stability and when it displays strong chaotic dynamics ...
Carlos Lizama +2 more
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D-inverse constellations [PDF]
Categories and General Algebraic Structures with ApplicationsConstellations are partial algebras in the sense that they possess a partial product, and a unary operation modelling domain. They were first used to give an ESN-style theorem for left restriction semigroups in terms of so-called inductive ...
Victoria Gould, Timothy Stokes
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An ordered set of Nörlund means
International Journal of Mathematics and Mathematical Sciences, 1981 Nörlund methods of summability are studied as mappings from ℓ1 into ℓ1. Those Nörlund methods that map ℓ1 into ℓ1 are characterized. Inclusion results are given and a class of Nörlund methods is shown to form an ordered abelian semigroup.
J. Defranza
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Regular Ordered Ternary Semigroups in Terms of Bipolar Fuzzy Ideals
Mathematics, 2019 Our main objective is to introduce the innovative concept of (α,ß)-bipolar fuzzy ideals and (α,ß)-bipolar fuzzy generalized bi-ideals in ordered ternary semigroups by using the idea of belongingness and quasi-coincidence of an ...
Shahida Bashir +2 more
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Certain Partial Orders on Semigroups [PDF]
Czechoslovak Mathematical Journal, 2001 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Positive implicative ordered filters of implicative semigroups
International Journal of Mathematics and Mathematical Sciences, 2000 We introduce the notion of positive implicative ordered filters in implicative semigroups. We show that every positive implicative ordered filter is both an ordered filter and an implicative ordered filter.
Young Bae Jun, Kyung Ho Kim
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