Some memories of boarding school #45;The geometrical genus of the moduli space of abelian varieties;On the cohomology groups of the field of rational functions;On topological filtration for Severi-Brauer varieties II;On the norm residue homomorphism for fields;Concerning Hall's theorem;Simplicial determinant maps and the second term of weight filtrations;On common zeros of two quadratic forms;Isogenies of height one and filtrations of formal groups;Homology stability for unital algebras;Willmore surfaces, 4-particle Toda lattice and double coverings of hyperelliptic surfaces;On the Birkhoff standard form of linear systems of ODE;NC solving of a system of linear ordinary differential equations in several unknowns;Hyperreflexivity of contractions close to isometries;On the definition of the 2-category of 2-knots;Application of topology to some problems in combinatorial geometry;Homology and cohomology of hypersurfaces with quadratic singular points in generic position;Asymptotic solutions to the quantized Knizhnik-Zamolodchikov equation and Bethe vectors