Topological relations such as inside, outside, or intersection are ubiquitous to our spatial thinking. Here, we examined how people reason deductively with topological relations between points, lines, ...

In our project (topology-toolkit) we wanted to use Boost instead of Qhull to have fewer third party libraries. We had some bug appearing when using Boost implemantation for convex hull, and after some ...

In this paper we describe two episodes of instructional interaction, in which examples are used in order to help students face their misconceptions. We introduce the notions of pivotal example and ...