Hostname: page-component-cd9895bd7-7cvxr Total loading time: 0 Render date: 2024-12-23T10:17:14.143Z Has data issue: false hasContentIssue false

On Multiplication by aid of a Table of Single Entry

Published online by Cambridge University Press:  18 August 2016

Abstract

Image of the first page of this content. For PDF version, please use the ‘Save PDF’ preceeding this image.'
Type
Other
Copyright
Copyright © Institute and Faculty of Actuaries 1854

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

page 237 note * To render the process given by this formula strictly linear, the table employed should be that of the fourth parts of the squares of numbers (rejecting the fraction for the odd numbers) in place of a table of the squares themselves. A like remark will apply, subject to certain modifications as regards the fractional part, to the general case. For the product of two numbers the scheme of the operations will thus come to consist of an addition, two subtractions, and two direct findings—in lieu of the addition,two direct and one reverse findings, required in the logarithmic process.

page 238 note * For a proof of this theorem, see London and Edinburgh Philosophical Magazine, April, 1854. The total number of terms in the right-hand side of the equation is easily seen to be 2r—1