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David Corfield, Towards a Philosophy of Real Mathematics. Cambridge: Cambridge University Press (2003), 300 pp., $70.00 (cloth).
Published online by Cambridge University Press: 01 January 2022
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References
1. The most compact definition of a groupoid is in category theory: “A groupoid is just a small category in which every arrow is invertible … From this perspective, groups … are groupoids with only one object” (211).