Finiteness of small factor analysis models

Details Finiteness of small factor analysis models Finiteness of small factor analysis models

2009-08-12

arxiv.org/abs/0908.1736v1

Mathematics

Statistics Theory

Scientific paper

We consider small factor analysis models with one or two factors. Fixing the number of factors, we prove a finiteness result about the covariance matrix parameter space when the size of the covariance matrix increases. According to this result, there exists a distinguished matrix size starting at which one can determine whether a given covariance matrix belongs to the parameter space by determining whether all principal submatrices of the distinguished size belong to the corresponding parameter space. We show that the distinguished matrix size is equal to four in the one-factor model and six with two factors.

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