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In this part of the series I discuss the five-vector generalizations of affine connection and gauge fields. I also give definition to the exterior derivative of nonscalar-valued five-vector forms and consider the five-vector analogs of the…

Mathematical Physics · Physics 2007-05-23 Alexander Krasulin

Notions of self-dual and anti self-dual almost quaternionic structures are introduced. The complete classification of self-dual and anti self-dual generalized Kaehler manifolds is obtained.

dg-ga · Mathematics 2008-02-03 V. F. Kirichenko , O. E Arseneva

The quadratic rank two Jacobi algebra is identified from the relations obeyed by the bispectral operators of the two variable Jacobi polynomials orthogonal on the triangle. It is seen to admit as subalgebras Racah and Jacobi algebras of…

Mathematical Physics · Physics 2025-07-11 Nicolas Crampe , Satoshi Tsujimoto , Luc Vinet , Alexei Zhedanov

A stream of new theta relations is obtained. They follow from the general Thomae formula, which is a new result giving expressions for theta derivatives (the zero values of the lowest non-vanishing derivatives of theta functions with…

Algebraic Geometry · Mathematics 2021-10-28 Julia Bernatska

The Jacobian conjecture over a field of characteristic zero is considered directly in view of the nonlinear partial differential equations it is associated with. Exploring the integrals of such partial differential equations, this work…

Algebraic Geometry · Mathematics 2025-07-25 Yisong Yang

We discuss the appearance of Jacobi automorphic forms in the theory of superconformal vertex algebras, explaining it by way of supercurves and formal geometry. We touch on related topics such as Ramanujan's differential equations for…

Representation Theory · Mathematics 2016-08-08 Jethro van Ekeren

In this second paper of the series we specify general theory developed in the first paper. Here we study the structure of Jacobi fields in the case of an analytic system and piece-wise analytic control. Moreover, we consider only…

Optimization and Control · Mathematics 2019-04-04 Andrei Agrachev , Ivan Beschastnyi

We prove surjectivity criteria for $p$-adic representations and we apply them to abelian varieties over number fields. In particular, we provide examples of Jacobians over $\dbQ$ of dimension $d\in\{1,2,3\}$ whose 2-adic representations…

Number Theory · Mathematics 2007-05-23 Adrian Vasiu

Vector fields with components which are generalized zero-forms are constructed. Inner products with generalized forms, Lie derivatives and Lie brackets are computed. The results are shown to generalize previously reported results for…

Mathematical Physics · Physics 2013-09-19 D. C. Robinson

We consider the moduli space of abelian varieties with two marked points and a frame of the relative de Rham cohomolgy with boundary at these points compatible with its mixed Hodge structure. Such a moduli space gives a natural…

Algebraic Geometry · Mathematics 2021-09-03 Jin Cao , Hossein Movasati , Roberto Villaflor Loyola

We first present some identities involving the Pochhammer symbol (rising factorial). We also recall and present some new properties of the Jacobi polynomials. We use them to expand a general hypergeometric function in an orthogonal series…

Classical Analysis and ODEs · Mathematics 2026-02-20 Paweł J. Szabłowski

We develop the theory of Hermitian Jacobi forms of lattice index, for both definite and indefinite Hermitian lattices. We also prove a theta decomposition theorem for vector-valued Jacobi forms (both in the orthogonal and Hermitian…

Number Theory · Mathematics 2023-10-26 Shaul Zemel

We prove the Strong Jacobi Bound Conjecture for generically reduced components of differential schemes.

Algebraic Geometry · Mathematics 2026-03-19 Taylor Dupuy , David Zureick-Brown

In this paper we introduce the notion of infinite dimensional Jacobi structure to describe the geometrical structure of a class of nonlocal Hamiltonian systems which appear naturally when applying reciprocal transformations to Hamiltonian…

Differential Geometry · Mathematics 2009-10-13 Si-Qi Liu , Youjin Zhang

We give a complete description of differential operators generating a given bracket. In particular we consider the case of Jacobi-type identities for odd operators and brackets. This is related with homotopy algebras using the derived…

Differential Geometry · Mathematics 2019-01-08 Hovhannes Khudaverdian , Theodore Voronov

It is shown that any second order dynamic equation on a configuration bundle $Q\to R$ of non-relativistic mechanics is equivalent to a geodesic equation with respect to a (non-linear) connection on the tangent bundle $TQ\to Q$. The case of…

Mathematical Physics · Physics 2015-06-26 L. Mangiarotti , G. Sardanashvily

We discuss the notion of Jacobi forms of degree one with matrix index, we state dimension formulas, give explicit examples, and indicate how closely their theory is connected to the theory of invariants of Weil representations associated to…

Number Theory · Mathematics 2007-11-06 Nils-Peter Skoruppa

We use the gradients of theta functions at odd two-torsion points --- thought of as vector-valued modular forms --- to construct holomorphic differential forms on the moduli space of principally polarized abelian varieties, and to…

We generalize the group law of curves of degree three by chords and tangents to the Jacobi variety of a hyperelliptic curve. In the case of genus 2 we accomplish the construction by a cubic parabola. We derive explicit rational formulas for…

Algebraic Geometry · Mathematics 2007-05-23 Frank Leitenberger

We show that that the Jacobi-identities for a W-algebra with primary fields of dimensions 3, 4 and 5 allow two different solutions. The first solution can be identified with WA_4. The second is special in the sense that, even though…

High Energy Physics - Theory · Physics 2009-10-22 K. Hornfeck