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In this paper we develop a theory of slice regular functions on a real alternative algebra $A$. Our approach is based on a well--known Fueter's construction. Two recent function theories can be included in our general theory: the one of…

Complex Variables · Mathematics 2018-07-02 Riccardo Ghiloni , Alessandro Perotti

We prove a Cauchy-type integral formula for slice-regular functions where the integration is performed on the boundary of an open subset of the quaternionic space, with no requirement of axial symmetry. In particular, we get a local…

Complex Variables · Mathematics 2023-10-16 Alessandro Perotti

The aim of this paper is to provide and prove the most general Cauchy integral formula for slice regular functions and for C^1 functions on a real alternative *-algebra. Slice regular functions represent a generalization of the classical…

Complex Variables · Mathematics 2016-02-12 Riccardo Ghiloni , Alessandro Perotti , Vincenzo Recupero

We present some new relations between the Cauchy-Riemann operator on the real Clifford algebra $\mathbb R_n$ of signature $(0,n)$ and slice-regular functions on $\mathbb R_n$. The class of slice-regular functions, which comprises all…

Complex Variables · Mathematics 2022-04-26 Alessandro Perotti

In this paper we study the additive splitting associated to the quaternionic Cauchy transform defined by the Cauchy formula of slice hyperholomorphic functions. Moreover, we introduce and study the analogue of the fundamental solution of…

Complex Variables · Mathematics 2019-01-30 Fabrizio Colombo , Samuele Mongodi

In this paper we offer a definition of monogenicity for functions defined on $\rr^{n+1}$ with values in the Clifford algebra $\rr_n$ following an idea inspired by the recent papers \cite{gs}, \cite{advances}. This new class of monogenic…

Complex Variables · Mathematics 2010-03-30 F. Colombo , I. Sabadini , D. C. Struppa

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

This work presents the basic elements and results of a Clifford algebra valued fractional slice monogenic functions theory defined from the null-solutions of a suitably fractional Cauchy-Riemann operator in the Riemann-Liouville and Caputo…

Complex Variables · Mathematics 2025-09-24 José Oscar González Cervantes , Juan Bory-Reyes

In this paper, we lay the foundations of the theory of slice regular functions in several variables ranging in any real alternative $^*$-algebra, including quaternions, octonions and Clifford algebras. This theory is an extension of the…

Complex Variables · Mathematics 2023-10-16 Riccardo Ghiloni , Alessandro Perotti

The aim of this paper is to extend the so called slice analysis to a general case in which the codomain is a real vector space of even dimension, i.e. is of the form $\mathbb{R}^{2n}$. We define a cone $\mathcal{W}_\mathcal{C}^d$ in…

Complex Variables · Mathematics 2024-01-05 Xinyuan Dou , Guangbin Ren , Irene Sabadini

Recently, the concept of generalized partial-slice monogenic (or regular) functions has been introduced and studied over Clifford algebras and octonions, respectively. In this paper, we further develop the theory of generalized…

Complex Variables · Mathematics 2026-03-17 Qinghai Huo , Irene Sabadini , Zhenghua Xu

We prove some formulas relating Cauchy-Riemann operators defined on hypercomplex subspaces of an alternative *-algebra to a differential operator associated with the concept of slice-regularity and to the spherical Dirac operator. These…

Complex Variables · Mathematics 2022-07-22 Alessandro Perotti

Since 2006 the theory of slice hyperholomorphic functions and the related spectral theory on the S-spectrum have had a very fast development. This new spectral theory based on the S-spectrum has applications, for example, in the formulation…

Functional Analysis · Mathematics 2021-11-15 Daniel Alpay , Fabrizio Colombo , Kamal Diki , Irene Sabadini

In this paper we show how to construct a regular, non commutative Cauchy kernel for slice regular quaternionic functions. We prove an (algebraic) representation formula for such functions, which leads to a new Cauchy formula. We find the…

Complex Variables · Mathematics 2010-03-30 Fabrizio Colombo , Graziano Gentili , Irene Sabadini

In this paper we summarize some known facts on slice topology in the quaternionic case, and we deepen some of them by proving new results and discussing some examples. We then show, following [18], how this setting allows us to generalize…

Complex Variables · Mathematics 2024-06-27 X. Dou , M. Jin , G. Ren , I. Sabadini

The two function theories of monogenic and of slice monogenic functions have been extensively studied in the literature and were developed independently; the relations between them, e.g. via Fueter mapping and Radon transform, have been…

Complex Variables · Mathematics 2024-12-19 Zhenghua Xu , Irene Sabadini

In a recent paper [Trans. Amer. Math. Soc. 378 (2025), 851-883], the concept of generalized partial-slice monogenic (or regular) function was introduced over Clifford algebras. The present paper shall extend the study of generalized…

Complex Variables · Mathematics 2026-05-19 Zhenghua Xu , Irene Sabadini

The concept of monogenic functions over real alternative $\ast$-algebras has recently been introduced to unify several classical monogenic (or regular) functions theories in hypercomplex analysis, including quaternionic, octonionic, and…

Complex Variables · Mathematics 2026-05-19 Qinghai Huo , Guangbin Ren , Zhenghua Xu

In this paper, we establish a connection between Dunkl analysis and slice analysis in the setting of Clifford algebras. Specifically, we show that a Clifford algebra-valued function is slice if, and only if, it belongs to the kernel of the…

Complex Variables · Mathematics 2026-01-15 Giulio Binosi , Hendrik De Bie , Pan Lian

As is the case for the theory of holomorphic functions in the complex plane, the Cauchy Integral Formula has proven to be a corner stone of Clifford analysis, the monogenic function theory in higher dimensional euclidean space. In recent…

Complex Variables · Mathematics 2019-11-26 Fred Brackx , Hennie De Schepper , Roman Lavicka , Vladimir Soucek
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