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pro vyhledávání: '"Brualdi, Richard"'
Autor:
Brualdi, Richard A., Cao, Lei
Publikováno v:
In Linear Algebra and Its Applications 15 September 2024 697:49-81
Autor:
Brualdi, Richard A., Dahl, Geir
Let $\Omega_n$ denote the class of $n \times n$ doubly stochastic matrices (each such matrix is entrywise nonnegative and every row and column sum is 1). We study the diagonals of matrices in $\Omega_n$. The main question is: which $A \in \Omega_n$ a
Externí odkaz:
http://arxiv.org/abs/2101.04143
Autor:
Brualdi, Richard A., Dahl, Geir
We study {\em sign-restricted matrices} (SRMs), a class of rectangular $(0, \pm 1)$-matrices generalizing the alternating sign matrices (ASMs). In an SRM each partial column sum, starting from row 1, equals 0 or 1, and each partial row sum, starting
Externí odkaz:
http://arxiv.org/abs/2101.04150
Autor:
Brualdi, Richard A., Dahl, Geir
We investigate $(0,1)$-matrices that are {\em convex}, which means that the ones are consecutive in every row and column. These matrices occur in discrete tomography. The notion of ranked essential sets, known for permutation matrices, is extended to
Externí odkaz:
http://arxiv.org/abs/2101.04148