69 citations · 221 across the 16 of their papers we have counts for
18 papers
Web invariants for flamingo Specht modules
Chris Fraser, Rebecca Patrias, Oliver Pechenik +1
Webs yield an especially important realization of certain Specht modules, irreducible representations of symmetric groups, as they provide a pictorial basis with a convenient diagr…
Relative cluster categories and Higgs categories with infinite-dimensional morphism spaces
Chris Fraser, Bernhard Keller, Yilin Wu
Cluster algebras *with coefficients* are important since they appear in nature as coordinate algebras of varieties like Grassmannians, double Bruhat cells, unipotent cells, ... . T…
Webs and canonical bases in degree two
Chris Fraser
We show that Lusztig's canonical basis for the degree two part of the Grassmannian coordinate ring is given by SL(k) web diagrams. Equivalently, we show that every SL(2) web immana…
Tensor diagrams and cluster combinatorics at punctures
Chris Fraser, Pavlo Pylyavskyy
Fock and Goncharov introduced a family of cluster algebras associated with the moduli of SL(k)-local systems on a marked surface with extra decorations at marked points. We study t…
Cyclic symmetry loci in Grasssmannians
Chris Fraser
The Grassmannian admits an action by a finite cyclic group via the cyclic shift map. We give a simple description of the points fixed by each element of this cyclic group, extendin…
Positroid cluster structures from relabeled plabic graphs
Chris Fraser, Melissa Sherman-Bennett
The Grassmannian is a disjoint union of open positroid varieties , certain smooth irreducible subvarieties whose definition is motivated by total positivity. The coordinate ri…