No CrossRef data available.
Published online by Cambridge University Press: 03 November 2016
* Although this proposition is necessary for the summation of an infinite number of terms of a Geometrical Progression with the common ratio less than unity, I believe there is only one English Text Book (Chrystal’s Alffebra) which contains a demonstration, and unfortunately that is far more difficult than it need be.
† Euclid proves this in the first proposition of the Tenth Book, for