Tome 13 (2021) no. 2

Sommaire

Principal angles between random subspaces and polynomials in two free projections
p. 3-10
Enveloping algebras of pre-Lie algebras of rooted trees
p. 11-28
Combinatorial k-systoles on a punctured torus and a pair of pants
p. 29-38
Length derivative of the generating function of walks confined in the quarter plane
p. 39-92
Contramodules
p. 93-182