| RefNo | EC/1984/26 |
| Previous numbers | Cert XXI, 162 |
| Level | Item |
| Title | Parry, William: certificate of election to the Royal Society |
| Date | 1979 |
| Description | Citation typed |
| Citation | Professor Parry is distinguished for his contributions to ergodic theory. His early work on transformations of the unit interval lead him to introduce the concept of "intrinsic Markov chain", and to use the resulting theory to settle certain questions concerning conjugacy classes of piecewise continuous maps of the interval. With collaborators he introduced, for stochastic processes, the idea of "regular isomorphism" (isomorphism which, at least approximately, preserves the "past"); with invariants based on information functions, he exhibited isomorphic Markov processes that are not regularly isomorphic. His work on measure preserving transformations which arise naturally in topological groups includes study of the structural relationship between transformations and their quotients. He obtained a measure-theoretic classification of certain affine transformations and nilflows, and proved that it coincides with the algebraic classification. |
| AccessStatus | Closed |
Fellows associated with this archive
| Code | PersonName | Dates |
| NA4171 | Parry; William (1934 - 2006) | 1934 - 2006 |