An introduction to projective geometry and its applications; an analytic and synthetic treatment (1905)
Emch, Arnold, b. 1871 · New York, J. Wiley & sons; London, Chapman & Hall, limited · leaf 227
fsf* >(W, G, / / / a. … Fig. 90. counter-axes vary, the pictures of a fixed circle K throughAXA2A3A4 form clearly a pencil of osculating conies. On every ray g (or the identical gx) through a fixed point B(assumed infinitely distant) this pencil cuts out an involutionwhose double-points are two points on the cuspidal…
Geometry, Projective · Geometry, Analytic
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