Uploaded February 2026 | Updated September 2026, 1 hour ago

---

Carl Friedrich von Weizsäcker Colloquium - January 21, 2026

Non-standard accessibility relations for many-valued modal logics - Edson Bezerra (University of Buenos Aires)

In this talk, we present three-valued modal logics based on the logics LP, K3,
L3, RM3 and LFI1. More specifically, we investigate Kripke models whose
accessibility relation is three-valued. We will show how this move interferes
in the truth conditions of modal formulas and will investigate what are the
modal principles these logics validate.