Error Bounds for the Krylov Subspace Methods for Computations of Matrix Exponentials

Hao Wang, Qiang Ye

In this paper, we present new a posteriori and a priori error bounds for the Krylov subspace methods for computing $e^{-\tau A}v$ for a given $\tau >0$ and $v\in C^n$, where $A$ is a larg…