Folina is currently very interested in 19th Century philosophy of mathematics, including the work of Hamilton, De Morgan, and Bolzano. She continues to be interested also in 20th Century philosophy of mathematics, including Poincaré and Weyl. She is also interested in the topic of justification in mathematics quite generally; in particular, the role of visual evidence and other less "rigorous" forms of justification, and their relation to mathematical proofs. Folina has taught at Macalester since 1989. EDUCATION: B.A., Williams College; M. Phil., Ph.D., St. Andrew’s University, Scotland

# Journal Articles

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

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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)

# Books

# Contributions to Books

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**Poincaré and the Invention of Convention**, *Poincaré, Philosopher of Science: Problems and Perspectives* (2014)

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**1790-1870: Some Developments in the Philosophy of Mathematics**, *The Cambridge History of Nineteenth Century Philosophy* (2012)

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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)

# Presentations

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**Mathematical Intensions, Intensionality in Mathematics, and Intuition**, *Midwest Philosophy of Mathematics Workshop* (2013)