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Creators/Authors contains: "Mataigne, Simon"

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  1. ; ; (, 7th International Conference on Geometric Science of Information)
    We present a method for computing an approximate Rieman-nian barycenter of a collection of points lying on a Riemannian mani-fold. Our approach relies on the use of theoretically proven under- and over-approximations of the Riemannian distance function. We compare it to Riemannian steepest descent on the exact objective function of the Riemannian barycenter and to an approach that approximates the Rie-mannian logarithm using lifting maps. Experiments are conducted on the Stiefel manifold. 
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    Free, publicly-accessible full text available April 22, 2026