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math.CO2018
The Fundamental Morphism Theorem in the Categories of Graphs & Graph Reconstruction
Tien Chih, Demitri Plessas
The Fundamental Morphism Theorem is a categorical version of the First Noether Isomorphism Theorem for categories that do not have kernels or cokernels. We consider two categories…
math.CO2015
Graphs and Their Associated Inverse Semigroups
Tien Chih, Demitri Plessas
Directed graphs have long been used to gain understanding of the structure of semigroups, and recently the structure of directed graph semigroups has been investigated resulting in…