
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. 
