e/Lefschetz duality

Information
has gloss	eng: In mathematics, Lefschetz duality is a version of Poincaré duality in geometric topology, applying to a manifold with boundary. Such a formulation was introduced by Solomon Lefschetz in the 1920s, at the same time introducing relative homology, for application to the Lefschetz fixed-point theorem. There are now numerous formulations of Lefschetz duality or Poincaré-Lefschetz duality, or Alexander-Lefschetz duality.
lexicalization	eng: Lefschetz duality
instance of	(noun) a set of points such as those of a closed surface or an analogue in three or more dimensions manifold