An object fo of this type must provide:
bool | fo ( SphericalKernel::Circular_arc_3 a ) | |||
Tests whether the arc a is -monotone, i.e. the intersection of
any meridian anchored at the poles of the context sphere used by the function SphericalKernel::is_theta_monotone_3_object
and the arc a is reduced to at most one point in general, and two points if a pole of that sphere is
an endpoint of a. Note that a bipolar circle has no such arcs.
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SphericalKernel::MakeThetaMonotone_3