نتایج جستجو برای: new varieties

تعداد نتایج: 1887946  

Journal: :Experimental Mathematics 2017
Jennifer Paulhus Anita M. Rojas

We present a new technique to study Jacobian variety decompositions using subgroups of the automorphism group of the curve and the corresponding intermediate covers. In particular, this new method allows us to produce many new examples of genera for which there is a curve with completely decomposable Jacobian. These examples greatly extend the list given by Ekedahl and Serre of genera containin...

2000
C. R. Grau

Alfalfa is the primary forage crop in Wisconsin and is a key element in the state’s dairy industry. The yield of new varieties is greater than that of Vernal and other older varieties due to genetic gains made by breeders over the years. Much of the yield advantage of new varieties may be attributed to efforts to breed for resistance to a wide variety of major pathogens of alfalfa such as Verti...

Journal: :Electr. J. Comb. 2010
Aba Mbirika

The Springer variety is the set of flags stabilized by a nilpotent operator. In 1976, T.A. Springer observed that this variety’s cohomology ring carries a symmetric group action, and he offered a deep geometric construction of this action. Sixteen years later, Garsia and Procesi made Springer’s work more transparent and accessible by presenting the cohomology ring as a graded quotient of a poly...

2006
Irene Brambilla

Firms that engage in international transactions have been shown to outperform domestic firms in several dimensions. This paper studies the advantages of affiliates of multinationals to grow through an expansion in their range of products. I first develop a monopolistic competition model with multiproduct firms in which firms are heterogeneous in two dimensions: the fixed cost of developing new ...

2000
Joël Merker

§1. Geometry of finite type and review of CR-extension theory . . . . .2. §2. Identification of CR vector fields and of Segre varieties . . . . . . . . . .4. §3. Segre varieties and extrinsic complexification . . . . . . . . . . . . . . . . . . . .10. §4. Segre sets and iterated complexifications . . . . . . . . . . . . . . . . . . . . . . . . .12. §5. Segre varieties and conjugate Segre variet...

2001
SIMAN WONG

Let k be a totally real field, and let A/k be an absolutely irreducible, polarized Abelian variety of odd, prime dimension whose endomorphism rings is non-trivial and is defined over k. Then the only strictly compatible families of abstract, absolutely irreducible representations of Gal(k/k) coming from A are tensor products of Tate twists of symmetric powers of two-dimensional λ-adic represent...

2003
MAJA VOLKOV

Let V be a p-adic representation of the absolute Galois group G of Qp that becomes crystalline over a finite tame extension, and assume p 6= 2. We provide necessary and sufficient conditions for V to be isomorphic to the p-adic Tate module Vp(A) of an abelian variety A defined over Qp. These conditions are stated on the filtered (φ,G)module attached to V . 2000 Mathematics Subject Classificatio...

2012
DAVID E. WEINSTEIN John Richard Hicks

Krugman (1979) brought the study of varieties into sharp focus by presenting a simple generalequilibrium model in which countries gain from trade through the import of new varieties. Since then, economists have been hampered in their ability to quantify the impact of new varieties on national welfare by the econometric and data hurdles that need to be surmounted. In this paper, we document some...

2008
Joseph M. Landsberg Laurent Manivel

We define many new examples of modules of equations for secant varieties of Segre varieties that generalize Strassen’s commutation equations [7]. Our modules of equations are obtained by constructing subspaces of matrices from tensors that satisfy various commutation properties.

2008
ULRICH GÖRTZ

We give a criterion which determines when a union of one-dimensional Deligne-Lusztig varieties has a connected closure. We obtain a new, short proof of the connectedness criterion for Deligne-Lusztig varieties due to Lusztig.

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