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math.NA2023
Tensorized block rational Krylov methods for tensor Sylvester equations
Angelo Alberto Casulli
We introduce the definition of tensorized block rational Krylov subspaces and its relation with multivariate rational functions, extending the formulation of tensorized Krylov subs…
math.NA2023
An efficient block rational Krylov solver for Sylvester equations with adaptive pole selection
Angelo A. Casulli, Leonardo Robol
We present an algorithm for the solution of Sylvester equations with right-hand side of low rank. The method is based on projection onto a block rational Krylov subspace, with two…