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math.RA2024
On von Neumann regularity of ample groupoid algebras
Benjamin Steinberg, Daniel W. van Wyk
We completely characterize when the algebra of an ample groupoid with coefficients in an arbitrary unital ring is von Neumann regular and, more generally, when the algebra of a gra…
math.RA2023
Characterizing Rickart and Baer ultragraph Leavitt path algebras
Mitchell Jubeir, Daniel W van Wyk
We characterize ultragraph Leavitt path algebras that are Rickart, locally Rickart, graded Rickart, and graded Rickart *-rings. We also characterize ultragraph Leavitt path algebra…