In the toolbox branch point curves are computed by minimally extended defining systems,
cf. [22], §4.1.2.
The branch point curve is defined by the following system
 |
(81) |
where
, while
and
are obtained by solving
 |
(82) |
Here
and
are functions and
and
are scalars and
where the bordering functions
and scalars
are chosen so that
is nonsingular. This method is implemented in the curve definition file branchpoint.m.