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On the Theory of the Plane Complex with Simple Geometrical and Kinematical Illustrations

Published online by Cambridge University Press:  03 November 2016

R. W. Genese
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Extract

OA,OB = x1, x2, being distances, carrying signs, along an axis, the “Bearing” of B with respect to A (called a vector, or step, or displacement) is given by AB = OB – OA = x2 – x1 in all cases, and is independent of the position of O.

If we wish to add two such steps, a construction is necessary, viz. they are placed “ end on ” in either order; and the sum is dependent on the position of O ; if M be the mid-point of AB, the sum = 20M.

Type
Research Article
Information
The Mathematical Gazette , Volume 11 , Issue 164 , May 1923 , pp. 293 - 301
Copyright
Copyright © Mathematical Association 1923

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References

page 297 of note * Variously called the Wallace point, Point de Miquel, and focus of the quadrilateral.