Results 111 to 120 of about 458,195 (236)

On the equivalence of fermionic string to bosonic string in two dimensions

open access: yes, 1995
Two-dimensional fermionic string theory is shown to have a structure of topological model, which is isomorphic to a tensor product of two topological ghost systems independent of each other.
Berkovits   +32 more
core   +1 more source

Harmonic-Arithmetic Index: Lower Bound for n-Order Trees With Fixed Number of Pendant Vertices and Monogenic Semigroup for Graph Operations

open access: yesInternational Journal of Mathematics and Mathematical Sciences
Graph theory combined with chemistry provides a strong framework for modeling and assessing chemical compounds. By representing molecules as graphs and applying topological indices, chemists can gain profound insights into the physical and chemical ...
Kalpana R., Shobana L.
doaj   +1 more source

From semi-tensor product of matrices to logical control systems

open access: yes, 2016
The logical control system theory (LCST) based on semi-tensor product (STP) of matrices has become a new direction in control field. The purpose of this paper is to give a comprehensive introduction to the logical control system, from the basic ...
Cheng Daizhan   +3 more
semanticscholar   +1 more source

Homological algebra with locally compact abelian groups

open access: yes, 2005
In this article we study locally compact abelian (LCA) groups from the viewpoint of derived categories, using that their category is quasi-abelian in the sense of J.-P. Schneiders.
Hoffmann, Norbert, Spitzweck, Markus
core   +2 more sources

Tensor product of Vertex operator algebras [PDF]

open access: yesarXiv, 1996
Let $V_1 \otimes V_2$ be a tensor product of VOAs. Using Zhu theory we discuss the theory of representations of V (associative algebra, modules and fusion rules). We prove that this theory is more or less the same as representation theory of tensor product of the associative algebras.
arxiv  

Categorical aspects of bivariant K-theory

open access: yes, 2007
This survey article on bivariant Kasparov theory and E-theory is mainly intended for readers with a background in homotopical algebra and category theory.
Meyer, Ralf
core   +3 more sources

On Sombor indices of generalized tensor product of graph families

open access: yesResults in Control and Optimization
Graph invariants are extensively being used in different fields for analysing the structural properties of different compounds. Several topological indices, their properties and relations between different indices have been explored. Ivan Gutman recently
Nadar Jenita Mary Masilamani Raja   +1 more
doaj  

Tensor products of representations up to homotopy [PDF]

open access: yesarXiv, 2010
We study the construction of tensor products of representations up to homotopy, which are the A-infinity version of ordinary representations. We provide formulas for the construction of tensor products of representations up to homotopy and of morphisms between them, and show that these formulas give the homotopy category a monoidal structure which is ...
arxiv  

Locally convex approach spaces

open access: yesApplied General Topology, 2003
We continue the investigation of suitable structures for quantified functional analysis, by looking at the notion of local convexity in the setting of approach vector spaces as introduced in [6].
M. Sioen, S. Verwulgen
doaj   +1 more source

Equivalence of tensor products over a category of W*-algebras [PDF]

open access: yesarXiv, 2017
We prove the equivalence of two tensor products over a category of W*-algebras with normal (not necessarily unital) *-homomorphisms, defined by Guichardet and Dauns, respectively. This structure differs from the standard tensor product construction by Misonou--Takeda--Turumaru, which is based on weak topological completion, and does not have a ...
arxiv  

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