Theoretical results

Proof sketch

Theorem: Under α-weak-orthogonality of v1 ... vm the row vectors of V, there exist a local minima of 4th order momentum momZ(V),4 of a sphered-zonotope Z(V) (VtV =Idn) , over Sn are O(αk)-close to each of its spanning vectors ±v1 ... ±vm

Proof Sketch: For sphered-zonotope, we still have :