An explicit three-component bivariate Gaussian mixture has at least seven distinct local maxima, refuting the predicted upper bound of six.
Maximum number of modes of Gaussian mixtures.Information and Inference: A Journal of the IMA, 9(3):587–600,
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At least seven modes in a heteroscedastic three-component bivariate Gaussian mixture
An explicit three-component bivariate Gaussian mixture has at least seven distinct local maxima, refuting the predicted upper bound of six.