4 papers
Algebraic Geometry of Electroid Varieties
Dawei Shen, Mia Smith, David E Speyer
Recent work of Lam, Bychkov-Gorbounov-Kazakov-Talalaev, and Chepuri-George-Speyer gave a stratification of the totally nonnegative Lagrangian Grassmannian into electroid cells para…
A Cambrian framework for the oriented cycle
Nathan Reading, David E. Speyer
This paper completes the project of constructing combinatorial models (called frameworks) for the exchange graph and g-vector fan associated to any exchange matrix B whose Cartan c…
Combinatorial frameworks for cluster algebras
Nathan Reading, David E Speyer
We develop a general approach to finding combinatorial models for cluster algebras. The approach is to construct a labeled graph called a framework. When a framework is constructed…
Sortable Elements for Quivers with Cycles
Nathan Reading, David E Speyer
Each Coxeter element c of a Coxeter group W defines a subset of W called the c-sortable elements. The choice of a Coxeter element of W is equivalent to the choice of an acyclic ori…