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#include <CGAL/global_functions_spherical_kernel_3.h>
| bool | is_theta_monotone ( Circular_arc_3<SphericalKernel> a, Sphere_3<SphericalKernel> sphere) | |||
Tests whether the arc a is  -monotone, i.e. the intersection of
any meridian anchored at the poles sphere and the arc a
is reduced to at most one point in general, and two points if a pole of sphere is an endpoint of the arc.
Note that a bipolar circle has no such arcs.
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