Real algebraic geometry for matrices over commutative rings

Details Real algebraic geometry for matrices over commutative rings Real algebraic geometry for matrices over commutative rings

2011-06-26

arxiv.org/abs/1106.5239v1

Mathematics

Algebraic Geometry

19 pages, submitted

Scientific paper

We define and study preorderings and orderings on rings of the form $M_n(R)$ where $R$ is a commutative unital ring. We extend the Artin-Lang theorem and Krivine-Stengle Stellens\"atze (both abstract and geometric) from $R$ to $M_n(R)$. While the orderings of $M_n(R)$ are in one-to-one correspondence with the orderings of $R$, this is not true for preorderings. Therefore, our theory is not Morita equivalent to the classical real algebraic geometry.

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