4 papers · 1 filter
Bangle functions are the generic basis for cluster algebras from punctured surfaces with boundary
Christof GeiÃ, Daniel Labardini-Fragoso, Jon Wilson
We prove that for any possibly-punctured surface with non-empty boundary , and any tagged triangulation of in the sense of F…
Laminations of punctured surfaces as -regular irreducible components
Christof GeiÃ, Daniel Labardini-Fragoso, Jon Wilson
Let be a surface with marked points on the boundary, and punctures $\mathbb{P}\subsetΣ\set…
Gentle algebras arising from surfaces with orbifold points, Part II: Locally free Caldero-Chapoton functions
Daniel Labardini-Fragoso, Lang Mou
We prove that in the skew-symmetrizable cluster algebras associated by Felikson-Shapiro-Tumarkin to unpunctured surfaces with orbifold points of order and a specific choice of…
Semicontinuous maps on module varieties
Christof GeiÃ, Daniel Labardini-Fragoso, Jan Schröer
We study semicontinuous maps on varieties of modules over finite-dimensional algebras. We prove that truncated Euler maps are upper or lower semicontinuous. This implies that -v…