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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