© 1990 by British Computer Society
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On the Consistency of Multi-valued Functions*

Department of Computer Science, University of Melbourne, Parkville 3052, Australia
Gallier1 generalised the notion of consistency in studying the sufficient conditions for the existence of optimal fixpoints. Chen2 introduced the notion of
-relatedness in investigating some fixpoints for the class of non-deterministic recursive programs. In this paper, it is proved that the notions of
-relatedness and consistency are equivalent for the class of multi-valued functions.
Received August 1986. revised December 1986.
* This paperis a revised versionOn Consisitency of Non-Determinism, Technical Report TR-A4-84, Centre of Computer Studies and Applications, University of Hong Kong, Hong Kong
Department of Computer Science, University of Melbourne, Parkville 3052, Australia