Added new pinv() operator and updated Reduced SVD #740
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pinv()operator for matrix pseudo-inverse using SVD in Reduced mode. Optionalrcondparameter which is used to define the cutoff for small singular values. Singular values smaller thanrcond * largest_singular_valueare set to 0.SVDMode::REDUCEDinterface so that U and VT tensors passed in must be of reduced size instead of the full size. That is, instead of U being of shape... x m x m, it should have shape... x m x kwherek=min(m,n). Similarly VT should be of shape... x k x n.det()documentation pageResolves #487