HOCHSCHILD COHOMOLOGY AND DERIVED PICARD GROUPS
Bernhard Keller
Dedicated to Idun Reiten on the occasion of her 60th birthday
We interpret Hochschild cohomology as the Lie algebra
of the derived Picard group (in the sense of Rouquier-Zimmermann and
Yekutieli) and deduce that it is preserved
under derived equivalences.
http://www.math.jussieu.fr/~keller/publ/hdpabs.html
Bernhard Keller, le 3 April, 2001.
keller@math.jussieu.fr
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