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What is the matter with negative r?
Published online by Cambridge University Press: 16 November 2021
Extract
Soon after the publication of the new edition of the SMP booklet Formulae for advanced mathematics with statistical tables, I received a letter from a colleague objecting to the statement that
“If the origin is taken at a focus of the conic,…, then the equation of the conic has the form
where e is the eccentricity …”
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- Copyright © The Mathematical Association 1991