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


Newton and hamilton: In defense of truth in algebra, Southern Journal of Philosophy (2012)


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


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


Contributions to Books

Gödel on How to Have your Mathematics and Know it Too, Interpreting Gödel : critical essays (2014)

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


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

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


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


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

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

Poincaré's philosophy of mathematics, Center for Philosophy of Science (2009)