Promiscuously Quadratic Rings
  We consider a convenient category of "quadratic" multirings, that allows simple functorial relations with categories associated with abstract quadratic forms theories and shares many good aspects of the theories of Special Groups and of Realsemigroups, but tries to avoids its drawbacks. 
Kaique Matias de Andrade Roberto, Hugo Rafael Ribeiro, Hugo Luiz   Mariano
math.RA math.AC