Feynman path integrals integrals, suggested heuristically by Feynman in the 40s, have become the basis of much of contemporary physics, from non relativistic quantum mechanics to quantum fields, including gauge fields, gravitation, cosmology.
An international Summer School on: "e;Modular functions of one variable and arithmetical applications"e; took place at RUCA, Antwerp University, from July 17 to - gust 3, 1972.
The book reports on recent work by the authors on the bifurcation structure of singular points of planar vector fields whose linear parts are nilpotent.
