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We present an inverse scattering approach to defects in classical integrable field theories. Integrability is proved systematically by constructing the generating function of the infinite set of modified integrals of motion. The…

Mathematical Physics · Physics 2015-05-13 V. Caudrelier

We prove a general Fueter Theorem over real alternative *-algebras. We show that a suitable power of the Laplacian maps Dunkl-regular functions to Dunkl monogenic functions with axial symmetries. Using the embedding of hypercomplex function…

Complex Variables · Mathematics 2026-04-15 Alessandro Perotti

We present a generic scheme to construct corrected trapezoidal rules with spectral accuracy for integral operators with weakly singular kernels in arbitrary dimensions. We assume that the kernel factorization of the form,…

Numerical Analysis · Mathematics 2012-11-27 Jae-Seok Huh , George Fann

The object of this paper is to investigate the certain results involving Bateman's matrix polynomials for integral index. We obtain some properties, integral representation and recurrence relations for hypergeometric matrix function. We…

General Mathematics · Mathematics 2024-07-18 Ghazi S. Khammash , Shimaa I. Moustafa , Shahid Mubeen , Saralees Nadarajah , Ayman Shehata

This paper continues the study of Fourier transforms on finite inverse semigroups, with a focus on Fourier inversion theorems and FFTs for new classes of inverse semigroups. We begin by introducing four inverse semigroup generalizations of…

Group Theory · Mathematics 2013-07-22 Martin E. Malandro

We develop a numerical method for computing with orthogonal polynomials that are orthogonal on multiple, disjoint intervals for which analytical formulae are currently unknown. Our approach exploits the Fokas--Its--Kitaev Riemann--Hilbert…

Numerical Analysis · Mathematics 2024-01-18 Cade Ballew , Thomas Trogdon

We introduce a new class of fractional backward orthogonal functions designed for the spectral approximation of weakly singular adjoint Volterra integral equations. These basis functions generate an approximation space that naturally…

Numerical Analysis · Mathematics 2026-05-29 Mahmoud A. Zaky

The present work develops certain analytical tools required to construct and compute invariant kernels on the space of complex covariance matrices. The main result is the $\mathrm{L}^1$--Godement theorem, which states that any invariant…

Functional Analysis · Mathematics 2025-04-17 Salem Said , Franziskus Steinert , Cyrus Mostajeran

In this present paper our aim is to deal with two integral transforms which involving the Gauss hypergeometric function as its kernels. We prove some compositions formulas for such a generalized fractional integrals with k Bessel function.…

Classical Analysis and ODEs · Mathematics 2016-12-13 G. Rahman , K. S. Nisar , S. Mubeen , M. Arshad

Holomorphic functions are fundamental in operator theory and their Cauchy formula is a crucial tool for defining functions of operators. The Fueter-Sce extension theorem (often called Fueter-Sce mapping theorem) provides a two-step…

Spectral Theory · Mathematics 2024-10-11 Fabrizio Colombo , Antonino De Martino , Stefano Pinton , Irene Sabadini , Peter Schlosser

The Fueter theorem provides a two step procedure to build an axially monogenic function, i.e. a null-solutions of the Cauchy-Riemann operator in $ \mathbb{R}^4$, denoted by $ \mathcal{D}$. In the first step a holomorphic function is…

Functional Analysis · Mathematics 2022-07-20 Antonino De Martino , Stefano Pinton

The goal of this paper is to formalize the notion of The Compositional Integral in The Complex Plane. We prove a convergence theorem guaranteeing its existence. We prove an analogue of Cauchy's Integral Theorem--and suggest an approach at…

General Mathematics · Mathematics 2020-11-03 James David Nixon

We study some arithmetic properties of the mirror maps and the quantum Yukawa coupling for some 1-parameter deformations of Calabi-Yau manifolds. First we use the Schwarzian differential equation, which we derived previously, to…

High Energy Physics - Theory · Physics 2009-10-28 Bong H. Lian , Shing-Tung Yau

The Fueter-Sce-Qian theorem provides a way of inducing axial monogenic functions in $\mathbb{R}^{m+1}$ from holomorphic intrinsic functions of one complex variable. This result was initially proved by Fueter and Sce for the cases where the…

Complex Variables · Mathematics 2022-03-08 Antonino De Martino , Kamal Diki , Alí Guzmán Adán

We propose a loop-level generalization of the inverse string theory Kawai-Lewellen-Tye (KLT) kernel: the planar inverse KLT integrand. The integrand is defined constructively via a novel Berends-Giele-like recursion that exposes the inverse…

High Energy Physics - Theory · Physics 2026-02-18 Christoph Bartsch , Karol Kampf , Jiří Novotný , Jaroslav Trnka

We further develop the new approach, proposed in part I (hep-th/9807072), to computing the heat kernel associated with a Fermion coupled to vector and axial vector fields. We first use the path integral representation obtained for the heat…

High Energy Physics - Theory · Physics 2014-11-18 F. A. Dilkes , D. G. C. McKeon , Christian Schubert

We present a new method for the numerical solution of singular integral equations on the real axis. The method's value stems from an explicit formula for the Cauchy integral of a complex exponential multiplied by a rational function.…

Numerical Analysis · Mathematics 2014-04-29 Thomas Trogdon

A standard technique for producing monogenic functions is to apply the adjoint quaternionic Fueter operator to harmonic functions. We will show that this technique does not give a complete system in L2 of a solid torus, where toroidal…

Complex Variables · Mathematics 2024-10-08 Z. Ashtab , J. Morais , R. Michael Porter

We introduce a framework for pulling back Cartier modules and their associated invariants along regular $F$-finite morphisms. To achieve this, we construct a relative Cartier isomorphism and operator for an arbitrary regular $F$-finite map…

Algebraic Geometry · Mathematics 2026-04-27 Javier Carvajal-Rojas , Axel Stäbler

In previous work the framework for a hypercomplex function theory in superspace was established and amply investigated. In this paper a Cauchy integral formula is obtained in this new framework by exploiting techniques from orthogonal…

Complex Variables · Mathematics 2014-02-26 H. De Bie , F. Sommen