Middle Perversity

Some articles on perversity:

Intersection Homology - Perversities
... Intersection homology groups IpHi(X) depend on a choice of perversity p, which measures how far cycles are allowed to deviate from transversality ... The origin of the name "perversity" was explained by Goresky (2010).) A perversity p is a function from integers ≥2 to integers such that p(2) = 0 p(k + 1) − p(k) is 0 ... The complementary perversity q of p is the one with Intersection homology groups of complementary dimension and complementary perversity are dually paired ...

Famous quotes containing the words perversity and/or middle:

    They who do not understand that a man may be brought to hope that which of all things is the most grievous to him, have not observed with sufficient closeness the perversity of the human mind.
    Anthony Trollope (1815–1882)

    Most safely shall you tread the middle path.
    Ovid (Publius Ovidius Naso)