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Quotation from Elements, Books I-VI by Euclid
“Euclid’s proofs of the propositions, in the Theory of Proportion, possess at present none but a historical interest, as no student reads them now”
Elements, Books I-VI, Book V, Introduction to the Definitions, trans. John Casey (3rd ed., 1885)
Casey's justification for replacing Euclid's Book V demonstrations with algebraic proofs while keeping the definitions and numbering.
Citation: "Euclid’s proofs of the propositions, in the Theory of Proportion, possess at present none but a historical interest, as no student reads them now" — Euclid, Elements, Books I-VI, Book V, Introduction to the Definitions, trans. John Casey (3rd ed., 1885). (id euclid-elements-books-i-vi-q8)
