@inbook{2d1cdb59799946be8bef102ee35e8d78,
title = "Preliminaries",
abstract = "Since the purpose of this work is to study the characteristic operator function and related topics in the quaternionic setting and for the sake of completeness, we recall in this chapter some definitions from the classical complex case.",
author = "Daniel Alpay and Fabrizio Colombo and Irene Sabadini",
note = "Publisher Copyright: {\textcopyright} 2020, The Author(s), under exclusive license to Springer Nature Switzerland AG.",
year = "2020",
month = jan,
day = "1",
doi = "10.1007/978-3-030-38312-1_1",
language = "English",
series = "SpringerBriefs in Mathematics",
publisher = "Springer Science and Business Media B.V.",
pages = "1--9",
booktitle = "SpringerBriefs in Mathematics",
address = "Germany",
}