The subject of this monograph is the quaternionic spectral theory based on the notion of S-spectrum. With the purpose of giving a systematic and self-contained

This book presents English translations of Michele Sce’s most important works, originally written in Italian during the period 1955-1973, on hypercomplex anal

This book presents a new theory for evolution operators and a new method for defining fractional powers of vector operators. This new approach allows to define

This work contributes to the study of quaternionic linear operators. This study is a generalization of the complex case, but the noncommutative setting of quate

This book features a collection of papers by plenary, semi-plenary and invited contributors at IWOTA2021, held at Chapman University in hybrid format in August