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 272
^, so that a=^^j^= and </» = tan~M - j, (3) becomes<4) ---^=--sin(^+c^).r r a Now take two Peaucellier inversors OABQP and OCDQP,Pig. 114, and by means of Kempes reversor as described in … Fig. 114. Fig. 113 keep lAOC= IBOD. This can be done by properlychoosing B, F, B, F of Fig. 113 on BO, AO, DO, CO of Fig. 114, 26o PROJECTIVE GEOMETRY. respectively. Let OP = r, OP=r\ {i and / the squares of the radii of the circles of inversion of the two inversors; OQ = p, I pOQ = p. Now OP-OQ =…
Geometry, Projective · Geometry, Analytic
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