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Displaying 441 – 460 of 1240

Higher order duality and toric embeddings

Alicia Dickenstein, Sandra Di Rocco, Ragni Piene (2014)

Annales de l’institut Fourier

The notion of higher order dual varieties of a projective variety, introduced by Piene in 1983, is a natural generalization of the classical notion of projective duality. In this paper we study higher order dual varieties of projective toric embeddings. We express the degree of the second dual variety of a 2-jet spanned embedding of a smooth toric threefold in geometric and combinatorial terms, and we classify those whose second dual variety has dimension less than expected. We also describe the...

Hilbert series of the Grassmannian and $k$ -Narayana numbers

Lukas Braun (2019)

Communications in Mathematics

We compute the Hilbert series of the complex Grassmannian using invariant theoretic methods. This is made possible by showing that the denominator of the $q$ -Hilbert series is a Vandermonde-like determinant. We show that the $h$ -polynomial of the Grassmannian coincides with the $k$ -Narayana polynomial. A simplified formula for the $h$ -polynomial of Schubert varieties is given. Finally, we use a generalized hypergeometric Euler transform to find simplified formulae for the $k$ -Narayana numbers, i.e. the $h$ -polynomial...

We prove that Hori-Vafa mirror models for smooth Fano complete intersections in weighted projective spaces admit an interpretation as Laurent polynomials.

How to draw tropical planes.

Herrmann, Sven, Jensen, Anders, Joswig, Michael, Sturmfels, Bernd (2009)

The Electronic Journal of Combinatorics [electronic only]

Currently displaying 441 – 460 of 1240

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Displaying 441 – 460 of 1240

Higher order duality and toric embeddings

Hilbert series of the Grassmannian and $k$ -Narayana numbers

Hilbert's Theorem 90 for K2, with Application to the Chow Groups of Rational Surfaces.

Hirzebruch-Mumford proportionality and locally symmetric varieties of orthogonal type.

Hirzebruch's Proportionality Theorem in the Non-Compact Case.

Hodge spaces of real toric varieties

Hodge type of subvarieties of IPn of small degrees.

Holomorphic Maps of Generalized Iwasawa Manifolds.

Homogene Räume k-affinoider Gruppen.

Homogeneous Algebraic Varieties Defined by Jordan Pairs.

Homogeneous Complex Surfaces.

Homogeneous-rational manifolds and unique factorization

Homological equivalence modulo algebraic equivalence is not finitely generated

Homologie du groupe linéaire et polylogarithmes

Homology of the Steinberg variety and Weyl group coinvariants.

Homology of tropical varieties

Homotopy Colimit of Quasi-join Diagrams

Homotopy types of subspace arrangements via diagrams of spaces.

Hori-Vafa mirror models for complete intersections in weighted projective spaces and weak Landau-Ginzburg models

How to draw tropical planes.

Currently displaying 441 – 460 of 1240