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Cubic Envelopes Derived from Systems of Conics

Published online by Cambridge University Press:  03 November 2016

Extract

The point of the question, “What is the envelope of the principal axes of conics touching any four lines?” posed by Prof. Forder on p. 83 of the current volume of the Gazette has puzzled me not a little; because (i) though my ignorance of the literature of coniCs is profound, yet that literature is so extensive that it seems unlikely that no solution of the problem has ever been published; and (ii) it seems even more unlikely that Prof. Forder is not in possession of a solution. However that may be, here is a solution which might have been submitted by a well-prepared candidate, had the question been set in a Cambridge Entrance Scholarship Examination, whether in December 1937 or in December 1906—or even in April 1877.

Type
Research Article
Copyright
Copyright © Mathematical Association 1938

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