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Several examples of Jacobi matrices with an explicitly solvable spectral problem are worked out in detail. In all discussed cases the spectrum is discrete and coincides with the set of zeros of a special function. Moreover, the components…

Spectral Theory · Mathematics 2013-01-11 Frantisek Stampach , Pavel Stovicek

We define theta blocks as products of Jacobi theta functions divided by powers of the Dedekind eta-function and show that they give a powerful new method to construct Jacobi forms and Siegel modular forms, with applications also in lattice…

Number Theory · Mathematics 2019-07-02 Valery Gritsenko , Nils-Peter Skoruppa , Don Zagier

We prove that if $X$ and $S$ are smooth varieties and $f\colon X\to S$ is an elliptic fibration with singular fibers curves of types I$_N$ with $N\geq 1$, II, III and IV, then the relative Jacobian $\hat{f}\colon \bar{M}_{X/S}\to S$ of $f$,…

Algebraic Geometry · Mathematics 2007-05-23 Ana Cristina Lopez

Jacobi sums and cyclotomic numbers are the important objects in number theory. The determination of all the Jacobi sums and cyclotomic numbers of order $e$ are merely intricate to compute. This paper presents the lesser numbers of Jacobi…

Number Theory · Mathematics 2019-06-19 Md Helal Ahmed , Jagmohan Tanti

In the Musielak-Orlicz type spaces ${\mathcal S}_{\bf M}$, exact Jackson-type inequalities are obtained in terms of best approximations of functions and the averaged values of their generalized moduli of smoothness. The values of…

Classical Analysis and ODEs · Mathematics 2020-06-17 F. G. Abdullayev , S. O. Chaichenko , M. Imashkyzy , A. L. Shidlich

In the article, the complete elliptic integrals of the first and second kinds are bounded by using the power series expansions of some functions, the celebrated Wallis' inequality, and an integral inequality due to R. P. Agarwal, P. Cerone,…

Classical Analysis and ODEs · Mathematics 2012-08-21 Bai-Ni Guo , Feng Qi

In this paper the fields of multiply periodic, or Kleinian $\wp$-functions are exposed. Such a field arises on the Jacobian variety of an algebraic curve, and provides natural algebraic models of the Jacobian and Kummer varieties, possesses…

Algebraic Geometry · Mathematics 2025-01-31 Julia Bernatska

In this paper the authors investigate a power mean inequality for a special function which is defined by the complete elliptic integrals.

Classical Analysis and ODEs · Mathematics 2013-02-13 Gendi Wang , Xiaohui Zhang , Yuming Chu

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 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

Our aim is to study the modular inequalities for some operators, for example the Bergman projection acting on, in Lebesgue spaces with variable exponent. Under proper assumptions on the variable exponent, we prove that the modular…

Complex Variables · Mathematics 2019-11-12 Mitsuo Izuki , Takahiro Noi , Yoshihiro Sawano

We describe a type of n-point function associated to strongly regular vertex operator algebras V and their irreducible modules. Transformation laws with respect to the Jacobi group are developed for 1-point functions. For certain elements…

Quantum Algebra · Mathematics 2015-08-27 Matthew Krauel , Geoffrey Mason

Sides and medians are both Jacobi coordinate magnitudes, moreover then equably entering the spherical coordinates on Kendall's shape sphere and the Hopf coordinates. This motivates treating medians on the same footing as sides in triangle…

General Relativity and Quantum Cosmology · Physics 2017-12-13 Edward Anderson

In this paper normal functions (in the sense of Griffiths) are used to solve and refine geometric questions about moduli spaces of curves. The first application is to a problem posed by Eliashberg: compute the class in the cohomology of…

Algebraic Geometry · Mathematics 2013-10-22 Richard Hain

This paper is concerned with the complexity and stability of arithmetic operations in the jacobian variety of curves over the field of complex numbers, as the genus grows to infinity. We focus on modular curves. Efficient and stable…

Number Theory · Mathematics 2007-05-23 Jean-Marc Couveignes

We look for differential equations satisfied by the generalized Jacobi polynomials which are orthogonal on the interval [-1,1] with respect to the classical weight function for the Jacobi polynomials together with point masses at both…

Classical Analysis and ODEs · Mathematics 2007-05-23 Roelof Koekoek

Based on Stokes' theorem we derive a non-holomorphic functional calculus for matrices, assuming sufficient smoothness near eigenvalues, corresponding to the size of related Jordan blocks. It is then applied to the complex conjugation…

Functional Analysis · Mathematics 2017-01-31 Olavi Nevanlinna

In this paper we study a continuity of the "values" of modular functions at the real quadratic numbers which are defined in terms of their cycle integrals along the associated closed geodesics. Our main theorem reveals a more finer…

Number Theory · Mathematics 2019-11-12 Yuya Murakami

This paper is a contribution to the study of the relations between special functions, Lie algebras and rigged Hilbert spaces. The discrete indices and continuous variables of special functions are in correspondence with the representations…

Mathematical Physics · Physics 2020-04-22 E. Celeghini , M. Gadella , M. A. del Olmo

The Jacobian group of a graph is a finite abelian group through which we can study the graph in an algebraic way. When the graph is a finite abelian covering of another graph, the Jacobian group is equipped with the action of the Galois…

Combinatorics · Mathematics 2023-03-02 Takenori Kataoka