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What Are the Real Numbers?

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Foundations of Mathematics
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Abstract

About one hundred years ago, Dedekind was Professor of Mathematics at the ETH in Zurich, teaching differential and integral calculus. He describes how teaching this particular subject he was confronted with the questions of the foundations of analysis. Dedekind’s little book „Was sind und was sollen die Zahlen1, which still makes enjoyable reading, reflects his ingenious approach to the problem.

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Further Reading

  • Dedekind, R.: Stetigkeit und irrationale Zahlen, 1872, in: R. Friche, E. Noether, O. Ore: Dedekind gesammelte mathematische Werke, vol. 3, pp. 315–334. Braunschweig, Vieweg, 1932

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  • Dedekind, R.: Was sind und was sollen die Zahlen? 1887, in: R. Friche, E. Noether, O. Ore: Dedekind gesammelte mathematische Werke, vol. 3, pp. 335–391. Braunschweig, Vieweg, 1932

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  • Hilbert, D.: Ueber den Zahlbegriff, zu finden im Anhang VI der Grundlagen der Geometrie, 7. Auflage, Stuttgart, Teubner, 1930

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  • Hilbert, D.: Ueber das Unendliche, Mathematische Annalen, vol. 95, pp. 161–190, (1926)

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  • Brouwer, L.E.J.: Begründung der Funktionenlehre unabhängig vom logischen Satz vom ausgeschlossenen Dritten, 1923, in: A. Heyting: L.E.J. Brouwer collected works, vol. 1, pp. 246–267. Amsterdam, North-Holland, 1975

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  • Brouwer, L.E.J.: Zur Begründung der intuitionistischen Mathematik, I, II & III, 1925–1927, in: A. Heyting: L.E.J. Brouwer collected works, vol. 1, pp. 301–314, 321–340, 352–389. Amsterdam, North-Holland, 1975

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  • Bernays, P.: Sur le Platonisme dans les Mathématiques, L’Enseignement Mathémathiques 34 (1935), English translation in P. Benacerraf & H. Putnam: Philosophy of Mathematics, selected readings, pp. 274–286, Englewood Cliffs, Prentice-Hall, 1964

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  • Weyl, H.: Ueber die neue Grundlagenkrise der Mathematik, Mathematische Zeitschrift, 10. pp. 39–79, (1921), also in Selecta Hermann Weyl. pp. 211–248, Basel & Stuttgart, Birkhäuser Verlag, 1956

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© 1993 Springer-Verlag Berlin Heidelberg

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Engeler, E. (1993). What Are the Real Numbers?. In: Foundations of Mathematics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-78052-3_1

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  • DOI: https://doi.org/10.1007/978-3-642-78052-3_1

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-78054-7

  • Online ISBN: 978-3-642-78052-3

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