xii Preface to the English Edition
Leon Takhtajan prepared a short appendix about the formalism
of classical mechanics. It should play the role of introduction for stu-
dents who did not take an appropriate course, which was obligatory
at St. Petersburg University.
I want to add that the idea of introducing quantum mechanics
as a deformation of classical mechanics has become quite fashionable
nowadays. Of course, whereas the term “deformation” is not used
explicitly in the book, the idea of deformation was a guiding principle
in the original plan for the lectures.
L. D. Faddeev
St. Petersburg, November 2008
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