Curves in Gödel-Space: Towards a Structuralist Ontology of Mathematical Signs

Studia Logica 96 (2):193-218 (2010)
Martin Pleitz
Westfälische Wilhelms Universität, Münster
I propose an account of the metaphysics of the expressions of a mathematical language which brings together the structuralist construal of a mathematical object as a place in a structure, the semantic notion of indexicality and Kit Fine's ontological theory of qua objects. By contrasting this indexical qua objects account with several other accounts of the metaphysics of mathematical expressions, I show that it does justice both to the abstractness that mathematical expressions have because they are mathematical objects and to the element of concreteness that they have because they are also used as signs. In a concluding section, I comment on the pragmatic element that has entered ontology by way of the notion of indexicality and use it to give an answer to a question Stewart Shapiro has recently posed about the status of meta-mathematics in the structuralist philosophy of mathematics
Keywords Philosophy   Computational Linguistics   Mathematical Logic and Foundations   Logic
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DOI 10.1007/s11225-010-9286-y
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Themes From Kaplan.Joseph Almog, John Perry & Howard Wettstein (eds.) - 1989 - Oxford University Press, Usa.
What Numbers Could Not Be.Paul Benacerraf - 1965 - Philosophical Review 74 (1):47-73.
Mathematical Thought and its Objects.Charles Parsons - 2007 - Cambridge University Press.

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