· tion is a regular compact surface homeomorphic to $2. we take in the space a rectangular...

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Page 1:  · tion is a regular compact surface homeomorphic to $2. We take in the space a rectangular Cartesian coordinate system Oxyz and we choose the z-axis to be the axis of rotation of
Page 2:  · tion is a regular compact surface homeomorphic to $2. We take in the space a rectangular Cartesian coordinate system Oxyz and we choose the z-axis to be the axis of rotation of
Page 3:  · tion is a regular compact surface homeomorphic to $2. We take in the space a rectangular Cartesian coordinate system Oxyz and we choose the z-axis to be the axis of rotation of
Page 4:  · tion is a regular compact surface homeomorphic to $2. We take in the space a rectangular Cartesian coordinate system Oxyz and we choose the z-axis to be the axis of rotation of