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The Anharmonic Ratios of 4 points in a straight line

Published online by Cambridge University Press:  20 January 2009

R. F. Muirhead
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The anharmonic ratio of four points A, B, C, D depends on the order in which they are taken. The A.I.G.T. “Syllabus,” following Cremona, defines the symbol (ABCD) to stand for , when A is conjugate to B and C to D. Thus, taking λ to denote the value of this double-ratio, we have

Type
Research Article
Information
Proceedings of the Edinburgh Mathematical Society , Volume 28 , February 1909 , pp. 14 - 22
Copyright
Copyright © Edinburgh Mathematical Society 1909