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Mathematics is everywhere and yet its objects are nowhere. There may be five apples on the table but the number five itself is not to be found in, on, beside or anywhere near the apples. So if not in space and time, where are numbers and other mathematical objects such as perfect circles and functions? And how do we humans discover facts about them, be it Pythagoras’ Theorem or Fermat’s Last Theorem? The metaphysical question of what numbers are and the epistemological question of how we know about them are central to the philosophy of mathematics. These and related philosophical questions are of particular interest because of mathematics’ unusual status. Mathematics is exceptional in that, on the one hand, it appears unhesitatingly true—no one doubts that 2 + 3 = 5—but on the other, as just noted, it is not about the physical world. This ambivalent status is what gives the philosophy of mathematics its special interest.

The philosophy of mathematics is also one of the oldest academic fields, more or less coeval with philosophy itself. But contemporary philosophy of mathematics is rather different from its pre-twentieth-century antecedents, largely for three reasons. The first is that since the seventeenth century, mathematics has become integral to science. Science has over the past few centuries become increasingly mathematical, and indeed the fundamental science of nature, physics, is today recognised as a branch of applied mathematics. The second is that mathematics underwent a transformation in the course of nineteenth century: having started the century as a rather traditional-looking science of quantity it emerged a hundred years later a radically transformed abstract theory of structure. The final factor in the transformation of the philosophy of mathematics is the rise of modern logic. Developed by Frege, Cantor and others in the late nineteenth century, modern logic pervades contemporary mathematics, philosophy and computer science, and has had an immeasurable effect on the philosophy of mathematics.

These volumes will collect the major works in this major field, with a focus on the last few decades. The anthology will include technical work, which interprets philosophically significant mathematical results or subfields of mathematics, as well as purely philosophical writing, aimed at those without advanced mathematics. The collection should be of interest to both philosophers and mathematicians, as well as to anyone who is susceptible to wondering what the main intellectual tool used in science, economics and finance, and indeed everyday life is ultimately about.

Volume I: Historical Readings in the Philosophy of Mathematics

1. Plato (early 4^{th} century BC). From E. Hamilton & H. Cairns (eds. 1963 corrected reprint., Bollingen Foundation):*Meno* 80b-86b, W.K.C. Guthrie (trans.), pages 363-371

2. Plato (early 4^{th} century BC). From B. Jowett (ed.), *The Dialogues of Plato* (1953), Oxford University Press: *Phaedo *72e-77d, B. Jowett (trans.), pages 425-431

3. Plato (early 4^{th} century BC). From John Cooper (ed.), *Plato: Complete Works *(1997), (trans.) G.M.A. Grube & C.D.C. Reeve, Hackett: *Republic *Book 6, 507a-511e, pages 1126-1133.

4. Plato (early 4^{th} century BC). From John Cooper (ed.), *Plato: Complete Works *(1997), (trans.) G.M.A. Grube & C.D.C. Reeve, Hackett:* Republic *Book 7, 525a-527c, pages 1140-1145.

5. Aristotle (mid-4^{th} century BC). From Jonathan Barnes (ed.), *The Complete Works of Aristotle* (1984), Princeton University Press:*Metaphysics *Book B, part ii, pages 1574-1575.

6. Aristotle (mid-4^{th} century BC). From Jonathan Barnes (ed.), *The Complete Works of Aristotle* (1984), Princeton University Press:*Metaphysics* Book E, part I, page 1619.

7. Aristotle (mid-4^{th} century BC). From Jonathan Barnes (ed.), *The Complete Works of Aristotle* (1984), Princeton University Press:*Metaphysics* Book Z, part x-xi, pages 1633-1637.

8. Aristotle (mid-4^{th} century BC). From Jonathan Barnes (ed.), *The Complete Works of Aristotle* (1984), Princeton University Press:*Metaphysics* Book Th , part ix, page 1660.

9. Aristotle (mid-4^{th} century BC). From Jonathan Barnes (ed.), *The Complete Works of Aristotle* (1984), Princeton University Press:*Metaphysics* Book I, parts i-ii, pages 1662-1665.

10. Aristotle (mid-4^{th} century BC). From Jonathan Barnes (ed.), *The Complete Works of Aristotle* (1984), Princeton University Press:*Metaphysics* Book K, parts ii-iv and vii, pages 1675-1677 and 1680-1681.

11. Aristotle (mid-4^{th} century BC). From Jonathan Barnes (ed.), *The Complete Works of Aristotle* (1984), Princeton University Press:*Metaphysics* Book M, parts i-iii, pages 1701-1705

12. Aristotle (mid-4^{th} century BC). From Jonathan Barnes (ed.), *The Complete Works of Aristotle* (1984), (trans.) R.P. Hardie and R.K. Gaye, Princeton University Press.*Physics*, Book B, part ii, pages 330-332.

13. Aristotle (mid-4^{th} century BC). From Jonathan Barnes (ed.), *The Complete Works of Aristotle* (1984), Princeton University Press:*Physics*, Book C, parts vi-viii-8, pages 351-354.

14. Aristotle (mid-4^{th} century BC). From Jonathan Barnes (ed.), *The Complete Works of Aristotle* (1984), (trans.) J.A. Smith, Princeton University Press: *De Anima (On the Soul)*, Book C, parts vi-viii, pages 684-687.

15. René Descartes (1637) Part 2 of *Discourse on Method*, J. Cottingham, R. Stoothoff and D. Murdoch (trans. & eds.) *Descartes: Selected Philosophical Writings*, pages 25-31.

16. John Locke (1689), from *An Essay Concerning Human Understanding,* R.S. Woolhouse (ed.) (1997),Penguin: Book I, Chapter II, pages 59-75.

17. John Locke (1689), from *An Essay Concerning Human Understanding,* R.S. Woolhouse (ed.) (1997),Penguin: Book IV, Chapter II, pages 471-479.

18. George Berkeley (1710), *Treatise Concerning the Principles of Human Knowledge*, 118-134, pages 131-139, D. M. Clarke (ed) (2008), Cambridge University Press.

19. Gottfried Leibniz (1716), from R.S. Woolhouse and R. Francks (trans. and eds.) *G.W. Leibniz: Philosophical Texts *(1998), Oxford University Press. Sections 23 to 25 of *Reply to Bayle's Note L*, pages 252-253.

20. Gottfried Leibniz (1714), from R.S. Woolhouse and R. Francks (trans. and eds.) *G.W. Leibniz: Philosophical Texts *(1998), Oxford University Press. Sections 28 to 38 of *Monadology*, pages 271-273.

21. Gottfried Leibniz (1685), from P. Wiener (ed.) *Leibniz: Selections* (1951), Charles Scribner’s Sons. "The Art of Discovery" pages 50-58.

22. D’Alembert, J. L. (1751), *Preliminary Discourse to the Encyclopedia of Diderot *(1995), R.N.Schwab (transl), University of Chicago Press, pages 16-29.

23. Immanuel Kant (1787), from N. Kemp Smith (transl. and ed.) *Critique of Pure Reason* (B) (1929), Macmillan. Introduction and Transcendental Aesthetic, B1-73, pages 41-91.

24. Immanuel Kant (1783), from P. Carus & J. W. Ellington *Prolegomena to any future metaphysics that will be able to come forward as science* (1977), Hackett. Sections 6-13 (inc. Remarks I and II), pages 25-33.

25. John Stuart Mill (1843), from A System of Logic, volume 7 of Collected Works of John Stuart Mill, J.M. Robson (ed.) (1973), University of Toronto Press: Book II, Chapter VI, pages 252-261.

26. John Stuart Mill (1843), from A System of Logic, volume 7 of Collected Works of John Stuart Mill, J.M. Robson (ed.) (1973), University of Toronto Press: Book III, Chapter XXIV, pages 604-621.

27. Richard Dedekind (1888), "On the nature and meaning of numbers" in *Essays on the Theory of Numbers* (1963), pages 31-115, transl. by W.W. Beman, Dover.

28. Albert Einstein (1921), "Geometrie und Erfahrung", transl. by S. Bargmann as "Geometry and Experience" and repr. in his Ideas and Opinions (1954), Condor, pp. 232-46.

Volume II Early 20^{th} Century Philosophies: Logicism, Logical Empiricism,

Intuitionism and Formalism

Logicism and its critics

29. Gottlob Frege (1884), *Foundations of Arithmetic*, transl. by J. Austin (Blackwell, 1950),

sections 55-109, pages 67e-119e.

30. Gottlob Frege (1893), from *The Basic Laws of Arithmetic, *transl. and ed. by P. A. Ebert &

M. Rossberg with C. Wright, Oxford University Press. Introduction and Part I (sections 1 to

52), pp. 1-69 and Appendices to Volume I, pp. 239-251.

31. Bertrand Russell’s letter to Frege and Frege’s reply to Russell, transl. by B. Woodward,

in J. van Heijenoort (ed.), *From Frege to Gödel, a source book in Mathematical Logic 1879*

*-1931*, Harvard UP, pp 124-128.

32. Alfred North Whitehead & Bertrand Russell, B. (1910-13), Introduction to the 2^{nd} ed. and

Introduction, *Principia Mathematica*, pp. xii-xlvi and 1-84 of *Principia Mathematica to *56 *

(1997), Cambridge University Press.

33. Henri Poincaré (1906), "Mathematics and Logic III" transl. by G.B. Halsted & W. Ewald

and repr. in Ewald (1996), pp. 1052-1071.

34. Bertrand Russell (1919), *Introduction to Mathematical Philosophy *, Spokesman,

Chapters 1 (pp.1-10), 2 (pp.11-19), 3 (pp.20-28), 12 (pp.117-130), 13 (pp.131-143), and 18 (pp.194-206).

35. Crispin Wright (1997), "On the Philosophical Significance of Frege’s Theorem", in

R.G. Heck (ed.), *Language, Thought and Logic*: *Essays in Honour of Michael Dummett*. Pages 201-244.

36. George Boolos (1997), "Is Hume’s Principle Analytic?", in R.G. Heck (ed.), *Language, *

*Thought and Logic: Essays in Honour of Michael Dummett. *Pages 245-261.

Intuitionism

37. L.E.J. Brouwer, "On the significance of the principle of excluded middle in mathematics,

especially in function theory" incl. Addenda & Corrigenda, transl. by S. Bauer-Mengelberg,

repr. in van Heijenoort (1967), pp. 335-45.

38. Arend Heyting, (1931), "The intuitionist foundations of mathematics" (1931), transl. by

E. Putnam & G.J. Massey and repr. in P. Benacerraf & H. Putnam (eds), *Philosophy of *

*Mathematics: selected readings *1983, Cambridge University Press, pp 52-61.

39. Arend Heyting (1956), "Disputation", in P. Benacerraf & H. Putnam (eds), *Philosophy of *

*Mathematics: selected readings *1983, Cambridge University Press, pp. 66-76.

40. Michael Dummett (1973), "The philosophical basis of intuitionistic logic",

in his *Truth and Other Enigmas *(Duckworth, 1978), pages 215-47.

Formalism

41. David Hilbert (1925), "On the infinite", trans. by S. Bauer-Mengelberg, in

van Heijenoort (1967), pp. 367-392.

42. William Tait (1981), "Finitism", *Journal of Philosophy *77, pp. 524-46.

Logical Empiricism

43. A.J. Ayer (1936), Chapter IV of *Language, Truth and Logic*, Penguin, pages 64-83

44. Moritz Schlick (1925), §7 (pp.31-39) and §38 (pp.348-358) of *General Theory of *

*Knowledge *(1974), transl. by A. E. Blumberg, Springer-Verlag.

45. Rudolf Carnap (1950), "Empiricism, Semantics and Ontology",

repr. in Benacerraf & Putnam (1983), pp. 241-257.

Volume III Contemporary Foundations, Set Theory and Structuralism

46. Ernst Zermelo (1908), "Investigations in the Foundations of Set Theory I" trans. by S.

Bauer-Mengelberg as and repr. in J. van Heijenoort (ed.) (1967), *From Frege to Gödel*,

Harvard University Press, pp. 199-215.

47. Willard V. Quine (1960), Chapter 7 of *Word and Object *(pages 233-76), MIT Press.

48. Paul Benacerraf (1965), "What Numbers Could Not Be", *Philosophical Review *74, pp. 47-73.

49. Paul Benacerraf (1973), "Mathematical Truth", *The Journal of Philosophy* 70, pp. 661-679.

50. Penelope Maddy (1990), Chapter 2 of *Realism in Mathematics*, pages 36-80, Oxford

University Press.

51. Hilary Putnam (1967), "Mathematics without Foundations", *The Journal of Philosophy *64*, *pp. 5-22.

52. Geoffrey Hellman (1989), Introduction and Chapter 1 (pp. 1-52) of *Mathematics without Numbers*,

Oxford University Press.

53. Charles Parsons (1990), "The Structuralist View of Mathematical Objects", *Synthese *84, pp. 303-46.

54. David Lewis (1993), "Mathematics is Megethology", in his *Philosophical Papers* (1998),

Cambridge University Press, pp. 203-229.

55. Geoffrey Hellman (2001), "Three Varieties of Mathematical Structuralism",

*Philosophia Mathematica *9, pp. 184-211.

56. Alex Oliver & Timothy Smiley (2006), "What are sets and what are they for?",

*Philosophical Perspectives* 20, pp. 123-55.

57. Øystein Linnebo and Richard Pettigrew (2011), "Category Theory as an Autonomous Foundation",

*Philosophia Mathematica* 19, pp. 227–54.

Volume IV: Proof and Mathematical Justification

58. Kurt Gödel (1931), "On formally undecidable propositions of *Principia mathematica* and

related systems I", , transl. by J. van Heijenoort and repr. in vol. I of his *Collected Works*,* *

S. Feferman *et al. *(eds), Oxford University Press (1990), pp. 144-195.

59. Kurt Gödel (1964), "What is Cantor’s Continuum Problem?", repr. in vol. II of his

*Collected Works*, pp. 254-270.

60. George Boolos (1971), "The Iterative Conception of Set", *Journal of Philosophy* 68, pp. 215-231.

61. Imre Lakatos (1976), "A renaissance of empiricism in the recent philosophy of mathematics",

*The British Journal for the Philosophy of Science* 27, pp. 201-223.

62. Daniel Isaacson (1987) "Arithmetical Truth and Hidden Higher-Order Concepts",

in W.D. Hart (ed.), *The Philosophy of Mathematics*, Oxford University Press (1996), pp. 203-224.

63. Penelope Maddy (1988), "Believing the Axioms I", *Journal of Symbolic Logic* 53, pp. 481-511.

64. Penelope Maddy (1993), "Does *V* = *L*?", *Journal of Symbolic Logic *58, pp. 15-41

65. Don Fallis (1997), "The Epistemic Status of Probabilistic Proof", *Journal of Philosophy *94,

pp. 165-186.

66. Mic Detlefsen (2008), "Purity as an Ideal of Proof", in P. Mancosu (ed.),

*The Philosophy of Mathematical Practice*, Oxford University Press, pp. 179-197.

67. Peter Smith (2013), Chapters 44 and 45 (pages 338-66) of *An Introduction to Gödel’s *

*Incompleteness Theorems* (2^{nd} ed.), Cambridge University Press.

68. A.C. Paseau (2015) "Mathematical Knowledge without Proof", *The British Journal for the *

*Philosophy of Science, *pp.1-25.

Volume V: The Indispensability Argument

69. Willard V. Quine (1951), "Two Dogmas of Empiricism" in his *From A Logical Point of *

*View*, pages 20-46.

70. Willard V. Quine & Nelson Goodman (1947), "Steps Towards a Constructive Nominalism",

*Journal of Symbolic Logic* 12, pp. 105-22.

71. Hilary Putnam (1971), *Philosophy of Logic*, Harper & Row, repr. in his *Mathematics, Matter and *

*Method: Philosophical Papers* 1, pages 323-357, Cambridge University Press.

72. Hartry Field (1980), Preliminary Remarks and Chapters 1-5 (pp. 1-46) of

*Science without Numbers*, Blackwell.

73. Hartry Field (1984), "Is Mathematical Knowledge just Logical Knowledge?",

*Philosophical Review *93, pp. 509-52.

74. George Boolos (1985), "Nominalist Platonism", *Philosophical Review* 94, pp. 327-44.

75. Elliot Sober (1993), "Mathematics and Indispensability", *Philosophical Review *102, pp. 35-57.

76. Penelope Maddy (1997), Chapter II.6 of *Naturalism in Mathematics*, pages 133-157,

Oxford University Press.

77. John Burgess & Gideon Rosen (1997), *A Subject With No Object*, Oxford University Press,

pages 3-66 (Introduction) and pages 205-44 (Conclusion).

78. Mark Colyvan (2001), Chapters 4-6 (pp. 67-140) of *The Indispensability of Mathematics*,

Oxford University Press.

79. Alan Baker (2005), "Are there genuine mathematical explanations of physical phenomena?", *Mind *114,

pp. 223-238.

80. A.C. Paseau (2007), "Scientific Platonism", in M. Leng, A.C. Paseau & M. Potter (eds),

*Mathematical Knowledge*, Oxford University Press, pp. 123-149.

Critical Concepts in Philosophy is a well-established series in Routledge’s Major Works publishing programme.

Designed to meet research, reference, and teaching needs across the humanities and social sciences, Routledge Major Works gather together the best and most influential work on particular concepts, subjects, and individuals. The collections assemble previously published articles from a variety of journals, excerpts or chapters from previously published books, and materials from other sources which together provide users with historical purchase on the concept, subject, or individual in question, as well as a thorough overview of current issues.

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- MATHEMATICS / History & Philosophy
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- PHILOSOPHY / General
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- PHILOSOPHY / Logic
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