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Mostrando ítems 81-90 de 118
Artículo
Heisenberg superalgebras
(Taylor and Francis, 2009)
Heisenberg algebras are the only Lie algebras (g, [, ]) which verify [g, g] = Z(g) and dim(Z(g)) = 1, where Z denotes the center of the algebra. We classify nilpotent Lie superalgebras that verify the same algebraic ...
Artículo
Sex-specific differences in intestinal microbiota associated with cardiovascular diseases
(BMC, 2024-01-19)
Background Cardiovascular diseases (CVD), including coronary heart disease (CHD), display a higher prevalence in men than women. This study aims to evaluate the variations in the intestinal microbiota between men and ...
Artículo
Quasi-free divisors and duality
(Elsevier, 2004)
We prove a duality theorem for some logarithmic D-modules associated with a class of divisors. We also give some results for the locally quasi-homogeneous case.
Artículo
On the r-dynamic coloring of subdivision-edge coronas of a path
(AIMS Press, 2020)
This paper deals with the r-dynamic chromatic number of the subdivision-edge corona of a path and exactly one of the following nine types of graphs: a path, a cycle, a wheel, a complete graph, a complete bipartite graph, ...
Artículo
Homomorphisms and polynomial invariants of graphs
(Elsevier, 2009)
This paper initiates a general study of the connection between graph homomorphisms and the Tutte polynomial. This connection can be extended to other polynomial invariants of graphs related to the Tutte polynomial such ...
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On permanents of Sylvester Hadamard matrices
(Cornell University, 2013)
It is well-known that the evaluation of the permanent of an arbitrary (−1, 1)- matrix is a formidable problem. Ryser’s formula is one of the fastest known general algorithms for computing permanents. In this paper, Ryser’s ...
Artículo
Shortcut sets for plane Euclidean networks (Extended abstract)
(Elsevier, 2016)
We study the problem of augmenting the locus N of a plane Euclidean network N by inserting iteratively a finite set of segments, called shortcut set, while reducing the diameter of the locus of the resulting network. ...
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A historical perspective of Tian’s evolution algebras
(Elsevier, 2021)
Even if it has been less than a decade and a half since Tian introduced his concept of evolution algebras to represent algebraically non-Mendelian rules in Genetics, their study is becoming increasingly widespread mainly ...
Artículo
The 144 symmetries of the Littlewood-Richardson coefficients of SL3
(Cornell University, 2020)
We compute with SageMath the group of all linear symmetries for the Littlewood-Richardson associated to the representations of SL3. We find that there are 144 symmetries, more than the 12 symmetries known for the ...
Artículo
A combinatorial method for computing Steenrod squares
(Elsevier, 1999)
We present here a combinatorial method for computing Steenrod squares of a simplicial set X. This method is essentially based on the determination of explicit formulae for the component morphisms of a higher diagonal ...