bigrading

bigrading (plural bigradings)

1. indexing by means of a pair of integers
   • 2015, Gwyn Bellamy, Travis Schedler, “Kostka polynomials from nilpotent cones and Springer fiber cohomology”, in arXiv‎:

     This can be viewed as a bigrading on the cohomology of the flag variety; via W-algebras, we similarly obtain bigradings on the cohomology of all Springer fibers.

• abridging, brigading