Computing the Lyapunov operator φ-functions, with an application to matrix-valued exponential integrators

Dongping Li, Yue Zhang, Xiuying Zhang

In this paper, we develop efficient and accurate evaluation for the Lyapunov operator function ${\phi }_l({\mathcal{L}}_A)[Q],$ where ${\phi }_l(\cdot )$ is the function related to the exponentia…