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math.CO2019
The contraction category of graphs
Nicholas Proudfoot, Eric Ramos
We study the category whose objects are graphs of fixed genus and whose morphisms are contractions. We show that the corresponding contravariant module categories are Noetherian an…
math.CO2019
Functorial invariants of trees and their cones
Nicholas Proudfoot, Eric Ramos
We study the category whose objects are trees (with or without roots) and whose morphisms are contractions. We show that the corresponding contravariant module categories are Noeth…