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Costa with a hole
Gluings: schematic
Gluings: Evolver
Costa surfaces with a free-boundary hole
numerical models, cut off at |x| = 7
Model
Topological type
Ends ℓ
−
3
+
Boundary components b
−
1
+
Genus γ
−
0
+
Cut away a wedge
Type (ℓ, b, γ)
Cut away a wedge
Surface
Sphere and boundary curve
Cut the surface at |x| ≤
7.0
Whole model
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Red: the free boundary of the surface on the unit sphere. Grey: the equator.