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Of the many accounts of Lord Byron's mission to Greece and his
death at Missolonghi in 1824, very few were by eyewitnesses. In
this 1825 book, William Parry (1773 1859) describes in detail
Byron's last days, and records the poet's wishes and intentions
with regard to the Greek independence movement. Parry was working
in the naval dockyard at Greenwich when he was recruited by the
London Greek Committee to organise an artillery brigade to join
Byron in Greece. The original plan was scaled down, but in February
1824 Parry and some companions arrived in Missolonghi. Byron took
to him, and Parry, effectively his right-hand man, was with him
when he died. His book is in part a score-settling activity against
the opposing factions of the Committee both in Greece and England,
but it is also an important and detailed account of the death, and
of the creation of a myth."
Ergodic theory grew out of an important problem of statistical
mechanics which was resolved by Birkhoff and von Neumann in the
1930s. Since that time the subject has made its way to the centre
of pure mathematics, drawing on the techniques of many other areas
and, in turn, influencing those areas. The author has provided in
this slim volume a speedy introduction to a considerable number of
topics and examples. He includes sections on the classical ergodic
theorems, topological dynamics, uniform distribution, Martingales,
information theory and entropy. There is a chapter on mixing and
one on special examples. The book concludes with an appendix on the
spectral multiplicity theory of unitary operators.
The isomorphism problem of ergodic theory has been extensively
studied since Kolmogorov's introduction of entropy into the subject
and especially since Ornstein's solution for Bernoulli processes.
Much of this research has been in the abstract measure-theoretic
setting of pure ergodic theory. However, there has been growing
interest in isomorphisms of a more restrictive and perhaps more
realistic nature which recognize and respect the state structure of
processes in various ways. These notes give an account of some
recent developments in this direction. A special feature is the
frequent use of the information function as an invariant in a
variety of special isomorphism problems. Lecturers and
postgraduates in mathematics and research workers in communication
engineering will find this book of use and interest.
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