A Cauchy-integral framework that decouples preconditioner construction from Krylov iteration for f(A)b, with rational and polynomial branches, but the reported gains omit deflation eigensolver costs.
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An Integral-Based Framework for Preconditioning $f(A)b$
A Cauchy-integral framework that decouples preconditioner construction from Krylov iteration for f(A)b, with rational and polynomial branches, but the reported gains omit deflation eigensolver costs.