This erratum concerns paper EJS723: “Group symmetry and covariance regularization”, Electronic Journal of Statistics, Vol. 6 (2012) 1600–1640.
The paper contains a notational error in the statement of Schur’s lemma and the paragraph immediately succeeding it. The corrected version is below. We would like to thank Ilya Soloveychik for pointing out the error to us.
"Erratum: Group symmetry and covariance regularization." Electron. J. Statist. 7 3057 - 3058, 2013. https://doi.org/10.1214/13-EJS871