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Espaces formels et \(\pi\) -formels. (French) Zbl 0546.55013
Homotopie algébrique et algèbre locale, Journ. Luminy/France 1982, Astérisque 113-114, 96-108 (1984).
Summary: [For the entire collection see Zbl 0535.00017.]
Summary and synthesis of the theory of formal and \(\pi\) -formal spaces: Definition and properties, obstructions to formality and study of spaces with Poincaré duality are the three main aspects of this lecture.

55P62 Rational homotopy theory
55M05 Duality in algebraic topology
57P10 Poincaré duality spaces
17B70 Graded Lie (super)algebras
13N05 Modules of differentials
16W50 Graded rings and modules (associative rings and algebras)