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Euclidean, conformal, and hyperbolic geometry over classical, finite and other fields.
(1998)
Let ${\rm I\!E}$ be a quadratic extension of ${\rm I\!F}$ where the characteristic of ${\rm I\!F}$ is not two. We develop a hyperbolic geometry in this general set-up where $\IH={\rm I\!E}-{\rm I\!F}$ is the hyperbolic ...