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The intersection of the sphere of radius 1 centered at the origin and the cone z^2=x^2+y^2 (with z>0). The intersection of the sphere of radius 1 centered at the origin and the cone z^2=x^2+y^2 (with z>0). |
The intersection of the sphere of radius 1 centered at the origin and the cylinder x^2+y^2=1. The intersection of the sphere of radius 1 centered at the origin and the cylinder x^2+y^2=1. |
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