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Geometry and Algebra in the 19th c: two routes to formalism, History of the Philosophy of Science Meeting (2010)

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Intuition Between the Analytic-Continental Divide: Hermann Weyl's Philosophy of the Continuum, Philosophia Mathematica (2008)

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Church’s Thesis and the Variety of Mathematical Justifications, Church’s Thesis After 70 Years (2006)

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Poincaré’s Circularity Arguments for Mathematical Intuition, The Kantian Legacy in Nineteenth Century Science (2006)

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Ontology, Logic, and Mathematics (critical study of Philosophy of Mathematics Today, edited by M. Schirn), British Journal for the Philosophy of Science (2000)

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Pictures, Proofs and Mathematical Practice, British Journal for the Philosophy of Science (1999)

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Church’s Thesis: Prelude to a Proof, Philosophia Mathematica, Series 3 (1998)

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Proof and Knowledge in Mathematics, Philosophical Quarterly (1996)

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Putnam, Realism and Truth, Synthese (1995)

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Poincare's Conception of the Objectivity of Mathematics, Philosophia Mathematica (1994)

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Poincare and the Philosophy of Mathematics (1992)