Model No. 279 FA: 16
Description: The non-integrabel pfaffian problem ydx - xdy + k dz = 0. The surface elements are realized through carton discs; they are not summable to surfaces. Model designer: Dr. Hermann Brunn, München.
RE: Category: Oscillations and waves
RU: J 3 = A VII 41 vgl. A VII 45