We construct a four-parameter class of self-dual instanton solutions of the classical SU(2)-Yang-Mills equations in a closed Euclidean Robertson-Walker space-time. Supported in part by the US Department of Energy under Grant No. DEFG02-88ER 40388

A continuous time version of Kronecker’s Lemma is established and used to give rates of convergence for parameter estimates in Hidden Markov Models. Acknowledgements: The support of NSERC grant A7964 is gratefully acknowledged. Professor Moore wishes to thank the Department of Mathematical Sciences, University of Alberta, for its hospitality in July 1996 when this work was carried out.

A multiparty computation protocol is said to be adaptively secure if it retains its security even in the presence of an adversary who can corrupt participants as the protocol proceeds. This is in contrast to the static corruption model where the adversary is forced to choose which participants to corrupt before the protocol begins. A central tool for constructing adaptively secure protocols is ...