THE WORK OF JAN-ERIK ROOS ON
THE COHOMOLOGY OF COMMUTATIVE RINGS
LUCHEZAR L. AVRAMOV
This is an attempt to present one aspect of the work of Jan-Erik Roos.
A glance at the list of publications reveals three clearly defined periods in*
life as an algebraist. During the first one he studied abelian categories, obta*
fundamental results on derived functors of inverse limits. They are contained *