Semicontinuous groups and separation properties.
Smooth quasigroups and loops: forty-five years of incredible growth
The remarkable development of the theory of smooth quasigroups is surveyed.
Some remarks on subgroups defined by the Bohr compactification.
Some theorems on hemigroups.
Spaces and equations
It is proved, for various spaces A, such as a surface of genus 2, a figure-eight, or a sphere of dimension ≠ 1,3,7, and for any set Σ of equations, that Σ cannot be modeled by continuous operations on A unless Σ is undemanding (a form of triviality that is defined in the paper).
Standard threads and distributivity.
Sul la theorie de la dimension dans les hypergroupes
Summable subsequences in convergence groups
Sur mon article 'une topologie du monoide libre".