The Ring of Integers in the Canonical Structures of the Planes

José C. Cifuente, João E. Strapasson, Ana C. Corrêa +1

The \emph{canonical structures of the plane} are those that result, up to isomorphism, from the rings that have the form $\mathds{R}[x]/(ax^2+bx+c)$ with $a\ne 0$.That ring is iso…