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Principia mathematica, vol. 1 (of 3)

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Project Gutenberg EPUB3 edition Whitehead, Alfred North and Russell, Bertrand

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[66]Leçons sur la théorie des fonctions (Paris, 1898), Note I (pp. 102-7).

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Principia mathematica, vol. 1 (of 3), Project Gutenberg eBook #78050

*94. ON POWERS OF RELATIVE PRODUCTS. *95. ON THE EQUI-FACTOR RELATION.