Results 61 to 70 of about 1,288,795 (193)
The size of a stratifying system can be arbitrarily large
Comptes Rendus. Mathématique, 2023 In this short note we construct two families of examples of large stratifying systems in module categories of algebras. The first examples consist on stratifying systems of infinite size in the module category of an algebra $A$.
Treffinger, Hipolito
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Isomorphism Classes of Vertex-Transitive Tournaments
, 2023 Tournaments are graphs obtained by assigning a direction for every edge in an undirected complete graph. We give a formula for the number of isomorphism classes of vertex-transitive tournaments with prime order. For that, we introduce Cayley tournaments,
Zetzsche, Stefan
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On a relation between GAG codes and AG codes
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2023 In this paper, we first give a relationship between generalized algebraic geometry codes (GAG codes) and algebraic geometry codes (AG codes). More precisely, we show that a GAG code is contained (up to isomorphism) in a suitable AG code.
Şenel Engin, Öke Figen
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Forum of Mathematics, Sigma, 2023 We give a lattice theoretical interpretation of generalized deep holes of the Leech lattice VOA $V_\Lambda $ . We show that a generalized deep hole defines a ‘true’ automorphism invariant deep hole of the Leech lattice. We also show that there is a
Ching Hung Lam, Masahiko Miyamoto
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Abstract Euler Diagram Isomorphism [PDF]
, 2008 Euler diagrams are widely used for information visualization and form the basis of a variety of formal languages that are used to express constraints in computing.
Andrew Fish +6 more
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Polynomial-time algorithms for Subgraph Isomorphism in small graph classes of perfect graphs [PDF]
, 2016 Given two graphs, Subgraph Isomorphism is the problem of deciding whether the first graph (the base graph) contains a subgraph isomorphic to the second graph (the pattern graph).
Otachi, Yota +2 more
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Directed Graphs representing isomorphism classes of C-Hypergroupoids
Ratio Mathematica, 2012 We investigate the relation of directed graphs and hyperstructures by virtue of the graph hyperoperation. A new class of graphs arises in this way representing isomorphism classes of C-hypergroupoids and we present the 17 such graphs that correspond to ...
Antonios Kalampakas +2 more
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Frobenius Local Rings of Length 5 and Index of Nilpotency 3
MathematicsThis paper investigates finite local non-chain rings associated by the well-known invariants p,n,m,l, and k, where p is a prime number. In particular, we provide a comprehensive characterization of Frobenius local rings of length l=5 and index of ...
Sami Alabiad, Alhanouf Ali Alhomaidhi
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Isomorphisms between pattern classes [PDF]
Journal of Combinatorics, 2015 11 ...
Albert, M. H. +2 more
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Enumerating Switching Isomorphism Classes of Signed Graphs
, 2022 Let Γ be a simple connected graph, and let {+,−}^E(Γ) be the set of signatures of Γ. For σ a signature of Γ, we call the pair Σ = (Γ,σ) a signed graph of Γ.
Healy, Nathaniel
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