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math.ST2013★ 45 cited
Fixed points of the EM algorithm and nonnegative rank boundaries
Kaie Kubjas, Elina Robeva, Bernd Sturmfels
Mixtures of independent distributions for two discrete random variables can be represented by matrices of nonnegative rank . Likelihood inference for the model of such joint…
math.AC2013
Robust Toric Ideals
Adam Boocher, Elina Robeva
We call an ideal in a polynomial ring robust if it can be minimally generated by a universal Gröbner basis. In this paper we show that robust toric ideals generated by quadrics are…