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math.CO2019
Isoradial immersions
Cédric Boutillier, David Cimasoni, Béatrice de Tilière
Isoradial embeddings of planar graphs play a crucial role in the study of several models of statistical mechanics, such as the Ising and dimer models. Kenyon and Schlenker give a c…
math.CO2012
Principal minors Pfaffian half-tree theorem
Béatrice de Tilière
A half-tree is an edge configuration whose superimposition with a perfect matching is a tree. In this paper, we prove a half-tree theorem for the Pfaffian principal minors of a ske…