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The Anharmonic Ratio of Four Points in Space and the Discord of Two Pairs of Points

Published online by Cambridge University Press:  03 November 2016

R. F. Muirhead
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Extract

§ 1. The Anharmonic Ratio expressed in terms of Squared Distances. In Cremona’s notation, the symbol (AB, CD) stands for the quantity

where ABCD are four collinear points, A, B and C, D are Conjugate pairs. It is easy to show that

Type
Research Article
Information
The Mathematical Gazette , Volume 7 , Issue 111 , May 1914 , pp. 326 - 328
Copyright
Copyright © Mathematical Association 1914

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