The Webinar on Mathematics and Democracy took place on Thursday, June 12th, 2025 from 5 pm until 6 pm, with Natalia Jonard, Professor in the Department of Mathematics of the National Autonomous University of Mexico (UNAM), as our invited speaker. This virtual event was free and open to the general public.
The speaker shared different voting systems such as plurality or majority, second round, exhaustive election, Borda count and Condorcet’s principle. Natalia Jonard also mentioned how Nicolas de Condorcet, Nicolas de Cusa, Jean Charles de Borda, Pierre Simon Laplace, Charles Dogson and Kenneth Joseph Arrow are related to this topic. The speaker described Arrow’s Impossibility Theorem and Gibbard-Satterthwaite’s Theorem and explained why the ranked voting and the approval voting are recommended.
