| They are not created for fillet, notch, or slot features, which have a built-in implied tangency. |
| Specifically, I need to draw three tangent circles inside a larger circle, given 3 points of tangency. |
| From the usual tangency can be read the consumption choices and present saving or dissaving. |
| For complementary resources, this combination is also the point of tangency between an isocline and the constraint curve. |
| If in addition the Mobius transformations are required to respect the points of tangency, the limit set becomes a simple closed curve. |
| By joining all the points of tangency we construct a line ABC, which is an output expansion path. |
