Error control technique of quadrature-based algorithms for the action of real powers of a Hermitian positive-definite matrix

Motohiro Otsuka, Fuminori Tatsuoka, Tomohiro Sogabe +2

This study considers quadrature-based algorithms to compute $A^{\alpha }\mathbf{b}$, the action of a real power of a Hermitian positive-definite matrix $A$ on a vector $ \boldsymbol{b}…