2 citations · 2 across the 5 of their papers we have counts for
5 papers
Sizes of witnesses in Covtree
Jette Gutzeit, Kimia Shaban, Karen Yeats +1
Given a set of unlabelled posets, each of size , we say that a poset is a \emph{witness} to if is the set of downsets of size of . We say that is…
The algebraic structure of Dyson--Schwinger equations with multiple insertion places
Nicholas Olson-Harris, Karen Yeats
We give combinatorially controlled series solutions to Dyson--Schwinger equations with multiple insertion places using tubings of rooted trees and investigate the algebraic relatio…
Combinatorial interpretation of the coefficients of the causal set d'Alembertian
Karen Yeats
The causal set theory d'Alembertian has rational coefficients for which alternating expressions are known. Here, a combinatorial interpretation of these numbers is given.
Amplitudes from the Positive Tropical Grassmannian: Triangulations of Extended Diagrams
Bruno Giménez Umbert, Karen Yeats
The global Schwinger formula, introduced by Cachazo and Early as a single integral over the positive tropical Grassmannian, provides a way to uncover properties of scattering ampli…
Rado matroids and a graphical calculus for boundaries of Wilson loop diagrams
Susama Agarwala, Colleen Delaney, Karen Yeats
We study the boundaries of the positroid cells which arise from N = 4 super Yang Mills theory. Our main tool is a new diagrammatic object which generalizes the Wilson loop diagrams…