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Perspective Triads

Published online by Cambridge University Press:  03 November 2016

W.R. Andress ,
W. Saddler  and
W.W. Sawyer
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Extract

Consider two triads of points, a, b, c, a', b', c' in a plane ; then, using homogeneous coordinates and regarding the points as specified by the corresponding vectors, we may write

and writing b × c = α, c × a = β, a × b = γ then a × a' = m1γ − n1β, b × b' = n2α − l2γ, c × c' = l3β − m3α.

Type
Research Article
Information
The Mathematical Gazette , Volume 37 , Issue 322 , December 1953 , pp. 247 - 255
Copyright
Copyright © The Mathematical Association 1953

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