polar - polar form
[Ro,Theta]=polar(A) returns the polar form of A i.e. A=Ro*expm(%i*Theta) Ro symmetric >=0 and Theta hermitian >=0.
A=rand(5,5); [Ro,Theta]=polar(A); norm(A-Ro*expm(%i*Theta),1)
expm , svd ,
F. Delebecque INRIA; ;
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