Results 11 to 20 of about 642,033 (312)
Higher secant varieties of Segre-Veronese varieties [PDF]
, 2005 We study the dimension of the higher secant varieties $X^s$ of ${\Bbb X} = {\Bbb P}^{n_1}\times ...\times {\Bbb P}^{n_t}$ embedded the morphism given by ${\cal O}_{\Bbb X}({a_1,...,a_t})$. We call it a {\it Segre-Veronese variety} and the embedding a {\it Segre-Veronese embedding}. In several cases (e.g. for 3 factors {\Bbb P}^{1}, or when $s$ is small)
M. V. Catalisano +2 more
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Secant varieties of Grassmann varieties [PDF]
Proceedings of the American Mathematical Society, 2004 In this paper we discuss the dimensions of the (higher) secant varieties to the Grassmann varieties, embedded via the Plucker embeddings. We use Terracini's Lemma and the duality in the exterior algebra of a finite dimensional vector space to translate the problem into that of finding the dimension of a graded piece of a " fat" ideal in the exterior ...
GIMIGLIANO, ALESSANDRO +2 more
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Experimental Mathematics, 2017 In this paper we will prove that the six-dimensional Göpel variety in $P^{134}$ is generated by 120 linear, 35 cubic and 35 quartic relations. This result was already obtained in [RS] , but the authors used a statement in [Co] saying that the Göpel variety set theoretically is generated by the linear and cubic relations alone.
Freitag, Eberhard +1 more
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, 2021 This is a chapter in an upcoming Handbook of Automata ...
Straubing, Howard, Weil, Pascal
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Is Every Toric Variety an M-variety? [PDF]
manuscripta mathematica, 2006 A complex algebraic variety X defined over the real numbers is called an M-variety if the sum of its Betti numbers (for homology with closed supports and coefficients in Z/2) coincides with the corresponding sum for the real part of X. It has been known for a long time that any nonsingular complete toric variety is an M-variety.
Bihan, Frederic +3 more
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On the Ideals of Secant Varieties of Segre Varieties [PDF]
Foundations of Computational Mathematics, 2004 19 ...
J. M. Landsberg, Laurent Manivel
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Vegetable Research, 2022 Light is an important environmental factor for plant growth and development, different light qualities have different regulatory effects on plants. To investigate the effect of light quality on plants, we determined the physiological characteristics ...
Zhoubin Liu +9 more
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Diversity between and within farmers’ varieties of tomato from Eritrea [PDF]
, 2011 Tomato yields in Eritrea are low (15 Mg/ha) compared with 19 Mg/ha in Africa and 27 Mg/ha worldwide. This is partly caused by poor quality of varieties used.
Struik, P.C. +3 more
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Сортові ресурси жита посівного (Secale cereale L.) у Державному реєстрі сортів рослин України
Plant Varieties Studying and Protection, 2018 Мета. Аналіз формування сортового ресурсу жита посівного озимого для українських виробників. Результати. Сорти жита посівного (Secale cereale L.) проаналізовані за низкою господарсько-цінних ознак тастійкістю до абіотичних факторів.
В. Т. Саблук +2 more
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Horticulturae, 2023 Light is a crucial environmental component for plant growth, and light intensity plays a crucial function in controlling pigment anabolism in plants. We performed physiological characterisation, transcriptome, and metabolome investigations on purple leaf
Yiyu Shen +5 more
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