"This basin was of great depth, but so transparent was the water that the bottom, which seemed to consist of a thick mass of small round alabaster pebbles, was distinctly visible by glimpses, that is to say, whenever the eye could permit itself not to see, far down in the inverted heaven, the duplicate blooming of the hills." - E.A. Poe, in The domain of Arnheim.
Areas of interest [Keywords]: Dynamical systems [multidimensional shifts of finite type, topological entropy, Cantor dynamics, interval], Computability theory [turing machines, computable numbers], Statistical physics [exactly solvable models, square ice, hard square shift], Mathematics and consciousness [causation, causal structure, objectness, conceptualisation], Algebraic topology on graphs [universal cover, fundamental group].
Here is a description of my past research and research project and a short CV (updated 31st of Oct. 2020), and here a description of some teaching principles I believe in. One can find a list of my writings on page "Writings", and information and archives of some work groups I organized on page "Work groups", and a bibliography related to my current and past research on page "Bibliography".
Some opinion post by Y.Lecun about the current publishing model.
A manifesto [in French], by S.Sené for the choice of collective affiliation amongst universities.