  We formulate certain sufficient conditions for the symplectic monodromy of an
isolated quasihomogeneous singularity to be of infinite order in the relative
symplectic mapping class group of the Milnor fibre and give a proof using
Maslov classes, stability theory for Lagrangian folds resp. stable Morse theory
for generating families as well as algebraic results about relative cohomology
of smoothings of isolated singularities. Our conditions being slightly more
restrictive than Seidel's, in contrary to Seidel's proof, we do not use Floer
theory to derive this result. An alternative approach using bounding disks in
fibred Lagrangian families is given and its possible application to
generalizations to the non-quasihomogeneous case is discussed.
