Existence, substatiality, and counterfactuality: Observations on the status of mathematics according to Aristotle, Euclid, and others Authors Jens H?yrup Downloads PDF Published 2000-01-01 Issue Existence, substatiality, and counterfactuality: Observations on the status of mathematics according to Aristotle, Euclid, and others, nr. 7, 2000 Section Hele nummeret