Higher geometry; an introduction to advanced methods in analytic geometry (1922)
Woods, Frederick S. (Frederick Shenstone), 1864- · Boston, New York, Ginn and Company · leaf 127
Fig. 38 Fig. 39 conic. They are the limiting cases of the pseudo circles of Case Iwhen the center recedes to infinity and the radius becomes infinite,and are called in non-Euclidean geometry limit circles or horicycles.III. The point C is outside the conic (Fig. 40), and the radiusis imaginary so…
Geometry, Analytic
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