Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4673142 | Indagationes Mathematicae | 2013 | 4 Pages |
Abstract
Using intuitionistic methods, an extension of an incidence plane was constructed by Heyting in 1959; however, a central question, the validity of the projective axiom that any two lines have a common point, was left open. A Brouwerian counterexample demonstrates that in the Heyting extension the common point axiom is constructively invalid.
Related Topics
Physical Sciences and Engineering
Mathematics
Mathematics (General)
Authors
Mark Mandelkern,