2004/12/31 by Igor Klep
Mathematics · #Advanced Topics in Algebra #Rings, Modules, and Algebras #Algebraic structures and combinatorial models
paper · doi:10.1081/agb-120029921
Abstract In this article we give an abstract graded (homogeneous) Positivstellensatz for noncommutative rings. Later we prove a version of Lang's homomorphism theorem and use it to deduce a geometric version of the homogeneous Positivstellensatz.