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ROTATE <factor_matrix>,<#_of_factors>,L  / ROTATION=COS,min_h2
makes the oblique Cosine rotation of Ahmavaara and Markkanen by
Mustonen's determinant criterion and algorithm. Let r be the number of
factors. The r new factor axes will coincide with the r most orthogonal
original variables in the factor space. The solution is found by
maximizing the `volume' of the simplex spanned by r variables. Parameter
min_h2 gives the lowest limit for the communality of a factor variable.
Default is 0.3 .
The algorithm is described in
Mustonen, S. (1999). Matrix computations in Survo. Proceedings of the
Eighth International Workshop on Matrices and Statistics, Department of
Mathematical Sciences, University of Tampere. 

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