Saunders Mac Lane quotes
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“... the notions category and functor were not formulated or put in print until the idea of a natural transformation was also at hand.”
-- Saunders Mac Lane -
“The standard "foundation" for mathematics starts with sets and their elements. It is possible to start differently, by axiomatising not elements of sets but functions between sets. This can be done by using the language of categories and universal constructions.”
-- Saunders Mac Lane -
“. . . in one sense a foundation is a security blanket: If you meticulously follow the rules laid down, no paradoxes or contradictions will arise. In reality there is now no guarantee of this sort of security . . .”
-- Saunders Mac Lane -
“. . . the membership relation for sets can often be replaced by the composition operation for functions. This leads to an alternative foundation for Mathematics upon categories -- specifically, on the category of all functions. Now much of Mathematics is dynamic, in that it deals with morphisms of an object into another object of the same kind. Such morphisms (like functions) form categories, and so the approach via categories fits well with the objective of organizing and understanding Mathematics. That, in truth, should be the goal of a proper philosophy of Mathematics.”
-- Saunders Mac Lane -
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Source : "'My discoveries weren't any more extensive or alarming than most people's. I just chose to look'". Interview with Antonia Crane, logger.believermag.com. November 5, 2013.
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“O marriage! marriage! what a curse is thine, Where hands alone consent and hearts abhor.”
Source : Aaron Hill (1760). “Muses in mourning. Zara, to which is added, an interlude, never before printed. Snake in the grass. Alzira. Saul. Daraxes. Merope. Roman revenge. Insolvent. Some love letters, by the author”, p.147
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Source : A. E. Waite (2012). “The Pictorial Key to the Tarot”, p.7, Courier Corporation
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Source : "Cartographer of Word Galaxies". Interview with Susan Lerner, logger.believermag.com. September 24, 2013.
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