English

Integral generalized equivariant cohomologies of weighted Grassmann orbifolds

Algebraic Topology 2022-06-24 v3 Algebraic Geometry

Abstract

We introduce a new definition of weighted Grassmann orbifolds. We study their several invariant qq-cell structures and the orbifold singularities on these qq-cells. We discuss when the integral cohomology of a weighted Grassmann orbifold has no pp-torsion. We compute the equivariant KK-theory ring of weighted Grassmann orbifolds with rational coefficients. We introduce divisive weighted Grassmann orbifolds and show that they have invariant cell structures. We calculate the equivariant cohomology ring, equivariant KK-theory ring and equivariant cobordism ring of a divisive weighted Grassmann orbifold with integer coefficients. We discuss how to compute the weighted structure constants for the integral equivariant cohomology ring of a divisive weighted Grassmann orbifold.

Keywords

Cite

@article{arxiv.2104.10374,
  title  = {Integral generalized equivariant cohomologies of weighted Grassmann orbifolds},
  author = {Koushik Brahma and Soumen Sarkar},
  journal= {arXiv preprint arXiv:2104.10374},
  year   = {2022}
}

Comments

30 pages, 1 figure. The previous version is subdivided into two parts. This part contains results related to weighted Grassmann orbifolds with some modification and new results. We are adding a few more results for simplicial GKM orbifold complex (which is 2nd section of previous version) and writing a seperate paper. Comments are welcome