Koushik Brahma

collaborators

4 papers

math.CO2026

Neutral-Fermion constructions of factorial $g p$ -and $g q$ -Functions

Koushik Brahma, Takeshi Ikeda, Shinsuke Iwao +1

We develop neutral-fermionic constructions for the factorial $g p$ -and $g q$ -functions introduced by Nakagawa and Naruse, which are respectively dual to the factorial $GQ$ - and $GP$ -…

math.AT2026

LS-category and topological complexity of real torus manifolds and Dold manifolds of real torus type

Koushik Brahma, Navnath Daundkar, Soumen Sarkar

The real torus manifolds are a generalization of small covers, and the Dold manifolds of real torus type are a class of non-trivial fibre bundles over the projective product spaces…

math.KT2026

Twisted factorial Grothendieck polynomials and equivariant $K$ -theory of weighted Grassmann orbifolds

Koushik Brahma

In this paper, we provide an explicit description of the Schubert classes in the equivariant $K$ -theory of weighted Grassmann orbifolds. We introduce the `twisted factorial Grothen…

math.AT2026

Integral cohomology rings of weighted Grassmann orbifolds and rigidity properties

Koushik Brahma

In this paper, we introduce `PlÃ¼cker weight vector' and establish the definition of a weighted Grassmann orbifold $Gr_{b} (k, n)$ , corresponding to a PlÃ¼cker weight vecto…

Neutral-Fermion constructions of factorial gp-and gq-Functions

LS-category and topological complexity of real torus manifolds and Dold manifolds of real torus type

Twisted factorial Grothendieck polynomials and equivariant K-theory of weighted Grassmann orbifolds

Integral cohomology rings of weighted Grassmann orbifolds and rigidity properties

Neutral-Fermion constructions of factorial $g p$ -and $g q$ -Functions

Twisted factorial Grothendieck polynomials and equivariant $K$ -theory of weighted Grassmann orbifolds