Richard J. Beach

A thesis
presented to the University of Waterloo
in fulfillment of the
thesis requirements for the degree of
Doctor of Philosophy
in
Computer Science

Waterloo, Ontario, 1985

© Richard J. Beach 1985

I hearby declare that I am the sole author of this thesis.

I authorize the University of Waterloo to lend this thesis to other institutions or individuals for the purpose of scholarly research.

Signature:

I further authorize the University of Waterloo to reproduce this thesis by photocopying or by other means, in total or in part, at the request of other institutions or individuals for the purpose of scholarly research.

Signature:

The University of Waterloo requires the signatures of all persons using or photocopying this thesis. Please sign below, and give address and date.