 Viggo Stoltenberg-Hansen and John Tucker developed in the early 1980s a general method of domain representations of topological algebras.Viggo is the main author of the textbook "Mathematical Theory of Domains", Cambridge University Press, 1994 (coauthored by I. Lindström and E. Griffor), and also of a set of Marktoberdorf summer school lecture notes on domain theory.Viggo Stoltenberg-Hansen and John Tucker made a thorough analysis of the computability associated to "effective algebras" and continuity of homomorphisms between such.