Kilian Raschel

In this talk we shall be interested in discrete harmonic functions in cones (in particular, in the quarter plane). The generating function of these harmonic functions satisfies a functional equation (closed to a well-known functional equation that...

In the 70's, Tutte developed a clever algebraic approach, based on certain "invariants," to solve a functional equation that arises in the enumeration of properly coloured triangulations. The enumeration of plane lattice walks confined to the first...

In the 70's, Tutte developed a clever algebraic approach, based on certain "invariants", to solve a functional equation that arises in the enumeration of properly coloured triangulations. The enumeration of plane lattice walks confined to the first...