Abstract

This paper examines the deeper philosophical core of Heisenberg’s thought. This core is regarded as a part of the reflection on the ontological problem raised by the modern physics, and, in particular, by the quantum mechanics. Two main aspects of it have been detected: an early representation of the theory-reality problem and the ontological question about the essence and the nature of mathematical knowledge. By highlighting two important and very different Heisenberg’s positions about the latter topic, a general point of view on the whole argument is made clear