Results 31 to 40 of about 1,388,843 (289)
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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Projected Richardson varieties and affine Schubert varieties [PDF]
, 2015 Let $G$ be a complex quasi-simple algebraic group and $G/P$ be a partial flag variety. The projections of Richardson varieties from the full flag variety form a stratification of $G/P$.
He, Xuhua, Lam, Thomas
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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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Farmers' management of rice varietal diversity in the mid-hills of Nepal: implications for on-farm conservation and crop improvement [PDF]
, 2009 Season-long monitoring of on-farm rice (Oryza sativa, L.) plots in Nepal explored farmers' decision-making process on the deployment of varieties to agroecosystems, application of production inputs to varieties, agronomic practices and relationship ...
B. R. Sthapit +22 more
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Asian Journal of Mathematics, 2007 21 ...
M. Landsberg, Joseph, Manivel, Laurent
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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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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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