Matrices of SL$${(4, \mathbb{R})}$$(4,R) that are the Product of Two Skew-Symmetric Matrices
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DOI: 10.1007/s00006-016-0701-y
Abstract: The Jordan forms of matrices that are the product of two skew-symmetric matrices over a field of characteristic $${\neq 2}$$≠2 have been a research topic in linear algebra since the early twentieth century. For such… read more here.
Keywords: two skew; matrices mathbb; jordan; symmetric matrices ... See more keywords
Product of two diagonal entries of a 3-by-3 normal matrix
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DOI: 10.1016/j.laa.2018.01.003
Abstract: Abstract The set of product of two diagonal entries of 3-by-3 normal matrices unitarily similar to a diagonal matrix is a triangle if the diagonal entries form an acute-angled triangle inscribed to the unit circle. read more here.
Keywords: diagonal entries; entries normal; product two; normal matrix ... See more keywords
The product of two chainable Kelley continua is also a Kelley continuum
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DOI: 10.1016/j.topol.2019.106924
Abstract: Abstract For many years, it was an open question whether the product of two Kelley continua is also a Kelley continuum. In 1977, Roger W. Wardle presented a Kelley continuum X such that X ×… read more here.
Keywords: product two; kelley; kelley continuum; also kelley ... See more keywords
The tensor product of two oriented quantum algebras
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DOI: 10.1142/s0219498820501042
Abstract: In this paper, we give the oriented quantum algebra (OQA) structures on the tensor product of two different OQAs by using Chen’s weak [Formula: see text]-matrix in [J. Algebra 204 (1998) 504–531]. As a special… read more here.
Keywords: product two; tensor product; oriented quantum; product ... See more keywords
Almost simple groups with no product of two primes dividing three character degrees
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DOI: 10.1515/jgth-2018-0188
Abstract: Abstract Let Irr(G){\operatorname{Irr}(G)} denote the set of complex irreducible characters of a finite group G, and let cd(G){\operatorname{cd}(G)} be the set of degrees of the members of Irr(G){\operatorname{Irr}(G)}. For positive integers k and l, we… read more here.
Keywords: groups product; two primes; almost simple; product two ... See more keywords
Minimal surfaces in the product of two dimensional real space forms endowed with a neutral metric
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DOI: 10.2996/kmj/kmj45108
Abstract: We investigate minimal surfaces in products of two-spheres ${\mathbb S}^2_p\times {\mathbb S}^2_p$, with the neutral metric given by $(g,-g)$. Here ${\mathbb S}^2_p\subset {\mathbb R}^{p,3-p}$ , and $g$ is the induced metric on the sphere. We… read more here.
Keywords: minimal surfaces; product two; dimensional real; neutral metric ... See more keywords
On the Degree of Product of Two Algebraic Numbers
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DOI: 10.3390/math11092131
Abstract: A triplet (a,b,c) of positive integers is said to be product-feasible if there exist algebraic numbers α, β and γ of degrees (over Q) a, b and c, respectively, such that αβγ=1. This work extends… read more here.
Keywords: degree product; product; algebraic numbers; product feasible ... See more keywords