Fans in the theory of real semigroups
Max A. Dickmann, Alejandro Petrovich · Dissertationes Mathematicae · 2020
In [DP1] we introduced the notion of a real semigroup (RS) as an axiomatic framework to study diagonal quadratic forms with arbitrary entries over (commutative, unitary) semireal rings. Two important classes of RSs were studied at length in [DP2