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math.FA2026

A variation of the inverse Fueter theorem and the generalized polyanalytic Cauchy-Kovalevskaya extension of order 2

Antonino De Martino, Stefano Pinton

In this paper, we first establish a generalized Cauchy--Kovalevskaya (GCK) extension for axially polyanalytic functions of order . We prove that the extension can be written as…

math.FA2026

A unified approach to the Dirac fine structures on the -spectrum and a connection with Jacobi polynomials

F. Colombo, A. De Martino, S. Pinton

This paper contributes to the recently introduced theory of fine structures on the -spectrum. We study, in a unified way, the functional calculi for axially Poly-Analytic-Harmon…

math.FA2026

On the application of the factorized Fueter-Sce map to the slice hyperholomorphic Cauchy kernel

Antonino De Martino, Stefano Pinton

The Fueter-Sce theorem is one of the most important results in hypercomplex analysis, providing a two-step procedure for constructing axially monogenic functions starting from holo…

math.FA2025

Functions and operators of the polyharmonic and polyanalytic Clifford fine structures on the -spectrum

Fabrizio Colombo, Antonino De Martino, Stefano Pinton

The spectral theory on the -spectrum originated to give quaternionic quantum mechanics a precise mathematical foundation and as a spectral theory for linear operators in vector…

math.FA2024

The -functional calculi for the quaternionic fine structures of Dirac type

Fabrizio Colombo, Stefano Pinton, Peter Schlosser

In this paper, we utilize various integral representations derived from the Fueter-Sce extension theorem, to introduce novel functional calculi tailored for quaternionic operators…