逻辑学与科学理论（二） (5-5)

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21. B. Bolzano, ‘Purely analytic proof of the theorem that between any two values which give results of opposite sign there lies at least one real root of the equation’ [1817], tr. S.B. Russ, in W. Ewald (ed.), From Kant To Hilbert: A Source Book in the Foundations of Mathematics (Oxford: Oxford University Press, 1996), 225–48. [New ed. by B. Jourdain (Leipzig: Engelmann, 1905)—GC/CE.]

22. [By Léon Brunschvicg (Paris: Alcan, 1912)—GC/CE.]

23. [Whence the idea of a hierarchy according to relations of dependence, with each subordinate science using the results of those that preceded it as regulative principles—JC.]

24. Plato, ‘Republic’, in Collected Dialogues, ed. E. Hamilton and H. Cairns (Princeton, NJ: Princeton University Press, 2002), 745–47 (509d–511e).

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