Results 41 to 50 of about 1,049 (188)
Falling 𝑑-Ideals in 𝑑-Algebras
Discrete Dynamics in Nature and Society, 2011 Based on the theory of a falling shadow which was first formulated by Wang (1985), a theoretical approach of the ideal structure in 𝑑-algebras is established. The notions of a falling 𝑑-subalgebra, a falling 𝑑-ideal, a falling 𝐵𝐶𝐾-ideal, and a falling 𝑑♯-
Young Bae Jun +2 more
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Free semigroups of large critical exponent
Journal of Topology, Volume 19, Issue 3, September 2026.Abstract For a convergence group equipped with an expanding coarse‐cocycle, we construct finitely generated free subsemigroups, which we call Bishop−−Jonessemigroups$\textit{Bishop--Jones semigroups}$, of critical exponent arbitrarily close to but strictly less than the critical exponent of the ambient group.
Aleksander Skenderi
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Konstruksi dan Analisis r-Ideal di BG-aljabar
Jambura Journal of MathematicsA non-empty set G with a binary operation ∗ and a constant 0 that satisfies the following axioms: , , and for all is called a BG-algebra. A non-empty subset I of G is said to be an ideal in G if it satisfies: (i) and (ii) and implies for all . This
Meivy Andhika Beauty +2 more
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Journal of Algebra, 1979 AbstractIn the setting A ⊂B ⊂A[x], if B is a Krull domain with torsion class group, so is A. Further relations are discussed, C(B) is proved to be an extension of C(A) by a finite group. The structure of B is described. Some examples are provided for the non-torsion class group case.
openaire +2 more sources
Surface subgroups for cocompact lattices of isometries of H2n$\mathbb {H}^{2n}$
Journal of Topology, Volume 19, Issue 3, September 2026.Abstract We prove the existence of surface subgroups within any cocompact lattice Γ$\Gamma$ in SO(2n,1)$\mathrm{SO}(2n,1)$ for n⩾2$n\geqslant 2$. This result addresses the cases missing from the work of Hamenstädt in 2015, who constructed surface subgroups in cocompact lattices for all other rank‐1 simple Lie groups of noncompact type.
Jeremy Kahn, Zhenghao Rao
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e-Subalgebras and e-Homomorphisms of PGK2-Algebras
Journal of MathematicsThis paper is devoted for three main purposes. First, subalgebras, e-subalgebras of a principal generalized K2-algebra (PGK2-algebra), and their associated principal generalized K2-triples are studied. We prove that every GM-subalgebra, GK-subalgebra, De
Abd El-Mohsen Badawy +3 more
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Fuzzy BCI-subalgebras with interval-valued membership functions
International Journal of Mathematics and Mathematical Sciences, 2001 The purpose of this paper is to define the notion of an interval-valued fuzzy BCI-subalgebra (briefly, an i-v fuzzy BCI-subalgebra) of a BCI-algebra. Necessary and sufficient conditions for an i-v fuzzy set to be an i-v fuzzy BCI-subalgebra are stated. A
Sung Min Hong +3 more
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Introduction of Neutrosophic Soft Lie Algebras [PDF]
Neutrosophic Sets and SystemsWe introduce the concept of neutrosophic soft Lie subalgebras of a Lie algebra and investigate some of their properties. The Cartesian product of neutrosophic soft Lie subalgebras will be discussed.
Sebuhi Abdullayev +2 more
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Multi-folded N-Structures with Finite Degree and its Application in BCH- Algebras
International Journal of Computational Intelligence Systems, 2020 The generalization of N-structure is introduced first and then applied to BCH-algebra for research. The concepts of k-folded N-subalgebra, k-folded N-closed ideal and (closed) k-folded N-filter are introduced, and then their relations and several ...
Jeong-Gon Lee, Kul Hur, Young Bae Jun
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Heights on ‘hybrid orbits’ in Shimura varieties
Proceedings of the London Mathematical Society, Volume 133, Issue 2, August 2026.Abstract We prove the ‘hybrid conjecture’ which is a common generalisation of the André–Oort conjecture and the André–Pink–Zannier conjecture, in the case of Shimura varieties of abelian type.
Rodolphe Richard, Andrei Yafaev
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