A Matrix Formulation of Kaiser's Varimax Criterion
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TL;DR
The varimax criterion for the solution of the rotation problem in factor analysis is given as a matrix equation involving only the unknown orthogonal rotation matrix and can be solved iteratively as a sequence of symmetric eigenproblems.
Abstract
Kaiser has given the varimax criterion for the solution of the rotation problem in factor analysis as well as a practical computational procedure for maximizing this criterion. In the present paper, the maximization condition is shown as a matrix equation involving only the unknown orthogonal rotation matrix. This matrix equation can be solved iteratively as a sequence of symmetric eigenproblems.