### Some articles on *perversity*:

Intersection Homology - Perversities

... Intersection homology groups IpHi(X) depend on a choice of

... 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)

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