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We compute the Hilbert coefficients of a graded module with pure resolution and discuss lower and upper bounds for these coefficients for arbitrary graded modules.

Commutative Algebra · Mathematics 2007-06-05 Juergen Herzog , Xinxian Zheng

We present different methods for symbolic computer algebra computations in higher dimensional (\ge9) Clifford algebras using the \Clifford\ and \Bigebra\ packages for \Maple(R). This is achieved using graded tensor decompositions,…

Mathematical Physics · Physics 2012-06-19 Rafal Ablamowicz , Bertfried Fauser

In this short article, we determine the bigness of the tangent bundle $T_X$ of the projective bundle $X=\mathbb{P}_C(E)$ associated to a vector bundle $E$ on a smooth projective curve $C$.

Algebraic Geometry · Mathematics 2022-08-02 Jeong-Seop Kim

This paper gives various methods for constructing vector bundles over elliptic curves and more generally over families of elliptic curves. We construct universal families over generalized elliptic curves via spectral cover methods and also…

alg-geom · Mathematics 2008-02-03 Robert Friedman , John W. Morgan , Edward Witten

We show that the binary representation of the integers has a role to play in many aspects of Clifford algebras.

Mathematical Physics · Physics 2017-01-13 Marco Budinich

We treat the problem of completing the moduli space for roots of line bundles on curves. Special attention is devoted to higher spin curves within the universal Picard scheme. Two new different constructions, both using line bundles on…

Algebraic Geometry · Mathematics 2007-05-23 Lucia Caporaso , Cinzia Casagrande , Maurizio Cornalba

We give an efficient algorithm to compute equations of twists of hyperelliptic curves of arbitrary genus over any separable field (of characteristic different from 2), and we explicitly describe some interesting examples.

Number Theory · Mathematics 2018-09-27 Davide Lombardo , Elisa Lorenzo García

In this paper we characterize the fiber representations of equivariant complex vector bundles over a circle and classify these bundles. We also treat the triviality of equivariant complex vector bundles over a circle by investigating the…

Algebraic Topology · Mathematics 2023-10-31 Jin-Hwan Cho , Sung Sook Kim , Mikiya Masuda , Dong Youp Suh

The aim of this paper is to give some characterizations for N-Legendre and N-slant curves in the unit tangent bundles of surfaces endowed with natural diagonal lifted structures.

Differential Geometry · Mathematics 2022-04-08 Murat Altunbaş

We study vector bundles on curves with rational tails and their smoothings and give a sufficient condition for the general fibre to be balanced.

Algebraic Geometry · Mathematics 2022-11-22 Ziv Ran

We study the syzygies of the canonical embedding of a ribbon $\widetilde{C}$ on a curve $C$ of genus $g \geq 1$. We show that the linear series Clifford index and the resolution Clifford index are equal for a general ribbon of arithmetic…

Algebraic Geometry · Mathematics 2025-02-19 Anand Deopurkar , Jayan Mukherjee

This work is the first in a series of papers that, among other things, extends the formalism of diolic differential calculus, wherein a new context for obtaining differential calculus in vector bundles was established. Here we provide a…

Differential Geometry · Mathematics 2023-04-03 Jacob Kryczka

In a companion article, the Clifford bundle over spacetime was used as a geometric framework for obtaining coupled Dirac and Einstein equations. Other forces may be incorporated using minimal coupling. Here the fundamental forces that are…

General Physics · Physics 2019-04-01 Jason Hanson

We present an algorithm for computing line bundle valued cohomology classes over toric varieties. This is the basic starting point for computing massless modes in both heterotic and Type IIB/F-theory compactifications, where the manifolds…

High Energy Physics - Theory · Physics 2010-11-11 Ralph Blumenhagen , Benjamin Jurke , Thorsten Rahn , Helmut Roschy

Associated with a symmetric Clifford system $\{P_0, P_1,\cdots, P_{m}\}$ on $\mathbb{R}^{2l}$, there is a canonical vector bundle $\eta$ over $S^{l-1}$. For $m=4$ and $8$, we construct explicitly its characteristic map, and determine…

Differential Geometry · Mathematics 2022-08-24 Chao Qian , Zizhou Tang , Wenjiao Yan

A survey on algorithms for computing discrete logarithms in Jacobians of curves over finite fields.

Cryptography and Security · Computer Science 2007-12-27 Andreas Enge

Different techniques from machine learning are applied to the problem of computing line bundle cohomologies of (hypersurfaces in) toric varieties. While a naive approach of training a neural network to reproduce the cohomologies fails in…

High Energy Physics - Theory · Physics 2019-01-09 Daniel Klaewer , Lorenz Schlechter

We study the algebra of complex polynomials which remain invariant under the action of the local Clifford group under conjugation. Within this algebra, we consider the linear spaces of homogeneous polynomials degree by degree and construct…

Quantum Physics · Physics 2009-11-10 Maarten Van den Nest , Jeroen Dehaene , Bart De Moor

This article uses basic homological methods for evaluating examples of compactly supported cohomology groups of line bundles over projective curve.

Complex Variables · Mathematics 2016-08-14 Małgorzata Aneta Marciniak

This paper investigates centralizers and twisted centralizers in degenerate and non-degenerate Clifford (geometric) algebras. We provide an explicit form of the centralizers and twisted centralizers of the subspaces of fixed grades,…

Rings and Algebras · Mathematics 2024-12-24 E. R. Filimoshina , D. S. Shirokov