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math.LO2018
Discrete orderings in the real spectrum
Shahram Mohsenipour
We study discrete orderings in the real spectrum of a commutative ring by defining discrete prime cones and give an algebro-geometric meaning to some kind of diophantine problems o…
math.CO2018
On finitary Hindman's numbers
Shahram Mohsenipour, Saharon Shelah
Spencer asked whether the Paris-Harrington version of the Folkman-Sanders theorem has primitive recursive upper bounds. We give a positive answer to this question.