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arXiv · 2404.05750

K-theories and Free Inductive Graded Rings in Abstract Quadratic Forms Theories

Kaique Matias de Andrade Roberto·Hugo Luiz mariano
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Abstract

We build on previous work on multirings (\cite{roberto2021quadratic}) that provides generalizations of the available abstract quadratic forms theories (special groups and real semigroups) to the context of multirings (\cite{marshall2006real}, \cite{ribeiro2016functorial}). Here we raise one step in this generalization, introducing the concept of pre-special hyperfields and expand a fundamental tool in quadratic forms theory to the more general multivalued setting: the K-theory. We introduce and develop the K-theory of hyperbolic hyperfields that generalize simultaneously Milnor's K-theory (\cite{milnor1970algebraick}) and Special Groups K-theory, developed by Dickmann-Miraglia (\cite{dickmann2006algebraic}). We develop some properties of this generalized K-theory, that can be seen as a free inductive graded ring, a concept introduced in \cite{dickmann1998quadratic} in order to provide a solution of Marshall's Signature Conjecture.

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Kaique Matias de Andrade Roberto, Hugo Luiz mariano. 2024-04-04. K-theories and Free Inductive Graded Rings in Abstract Quadratic Forms Theories. https://doi.org/10.52547/cgasa.2021.223166.1323

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