cosection

English

Etymology

co- +‎ section

Noun

cosection (plural cosections)

1. (mathematics) The left inverse of a morphism.
   • 2016, M. Kool, A. Gholampour, “Rank 2 wall-crossing and the Serre correspondence”, in arXiv‎^[1]:

     Provided ${\mathcal {R}}$ admits a cosection cutting out a 1-dimensional subscheme, we prove that the generating function of these Euler characteristics is equal to $M(q)^{2e(X)}$ times a polynomial of degree $c_{3}({\mathcal {R}})$.