St.Petersburg branch
of Steklov Mathematical Institute, Fontanka 27, St.Petersburg
191011, Russia. Email: perelman@pdmi.ras.ru or
perelman@math.sunysb.edu ; I was partially supported by personal
savings accumulated during my visits to the Courant Institute in
the Fall of 1992, to the SUNY at Stony Brook in the Spring of
1993, and to the UC at Berkeley as a Miller Fellow in 1993-95. I'd
like to thank everyone who worked to make those opportunities
available to me.
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