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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…
math.OC2015
Generalized Affine Programming & Duality Gap with non-Division Rings
Tien Chih
Classical primal-dual affine programming takes place over finite dimensional real vector spaces. This results in beautiful duality theory, connecting the optimal solu- tions of the…