@inbook{10.2307/j.ctt7t6pw.10,
ISBN = {9780691119212},
URL = {http://www.jstor.org/stable/j.ctt7t6pw.10},
abstract = {The full theoretical framework rising in this Chapter is due to Galati [118, 120], building on work of the author, de Launey, Flannery, Perera and Hughes, and the treatment here follows his. However, the material in Section 7.1 is standard, and more details may be found in texts such as [3, 276]. In this Section, the class of cocycles is expanded to its limit, the class offactor pairs, within the theory of group extensions, and basic properties of factor pairs are noted. As usual, we are interested in equivalence classes of factor pairs, particularly equivalence classes of thesplitting},
bookauthor = {K. J. Horadam},
booktitle = {Hadamard Matrices and Their Applications},
pages = {139--161},
publisher = {Princeton University Press},
title = {The Five-fold Constellation},
year = {2007}
}