Results 21 to 30 of about 1,572,343 (315)
Proceedings of the London Mathematical Society, 2016 Exponential varieties arise from exponential families in statistics. These real algebraic varieties have strong positivity and convexity properties, familiar from toric varieties and their moment maps. Among them are varieties of inverses of symmetric matrices satisfying linear constraints. This class includes Gaussian graphical models.
Michałek, Mateusz +3 more
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International Journal of Algebra and Computation, 2009 A class [Formula: see text] of algebras with a distinguished constant term 0 is called Fregean if congruences of algebras in [Formula: see text] are uniquely determined by their 0–cosets and ΘA (0,a) = ΘA (0,b) implies a = b for all [Formula: see text]. The structure of Fregean varieties is investigated. In particular it is shown that every congruence
Idziak, Paweł +2 more
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BMC Plant Biology, 2022 Background Carotenoid cleavage oxygenases (CCOs) include the carotenoid cleavage dioxygenase (CCD) and 9-cis-epoxycarotenoid (NCED), which can catalize carotenoid to form various apocarotenoids and their derivatives, has been found that play important ...
Xiao-Qi Yue +9 more
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Foundations of Computational Mathematics, 2017 The distortion varieties of a given projective variety are parametrized by duplicating coordinates and multiplying them with monomials. We study their degrees and defining equations. Exact formulas are obtained for the case of one-parameter distortions. These are based on Chow polytopes and Gröbner bases.
Kileel, Joe +3 more
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A global view of transcriptome dynamics during flower development in Capsicum annuum L.
Horticultural Plant Journal, 2023 An analysis of genome-wide gene expression profiles during floral organ development can provide important clues about the molecular basis of gene functions and developmental processes.
Bingqian Tang +7 more
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Asian Journal of Mathematics, 2007 21 ...
M. Landsberg, Joseph, Manivel, Laurent
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European Journal of Combinatorics, 1983 The Ramsey problem is considered for various classes of (universal) algebras. It is shown that every variety has singleton-Ramsey property and examples of varieties with singleton-Ramsey property only are given.
Ježek, Jaroslav, Nežetřil, Jaroslav
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Schubert varieties, toric varieties and ladder determinantal varieties [PDF]
Annales de l'Institut Fourier, 1997 We construct certain normal toric varieties (associated to finite distributive lattices) which are degenerations of the Grassmannians. We also determine the singular loci for certain normal toric varieties, namely the ones which are certain ladder determinantal varieties. As a consequence, we prove a refined version of the conjecture of Laksmibai &
Gonciulea, Nicolae +1 more
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Acta Mathematica, 2005 A distinguished variety is a variety that exits the bidisk through the distinguished boundary. We show that Ando's inequality for commuting matrix contractions can be sharpened to looking at the maximum modulus on a distinguished variety, not the whole bidisk.
Agler, Jim, McCarthy, John E.
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Minimal noncommutative varieties and power varieties [PDF]
Pacific Journal of Mathematics, 1984 A variety of finite monoids is a class of finite monoids closed under taking submonoids, quotients and \textit{finite} direct products. A language L is a subset of a finitely generated free monoid. The variety theorem of Eilenberg sets up a one to one correspondence between varieties of finite monoids and classes of languages called, appropriately ...
Margolis, Stuart W., Pin, Jean-Eric
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