Computing Functions of Symmetric Hierarchically Semiseparable Matrices
Computing Functions of Symmetric Hierarchically Semiseparable Matrices
The aim of this work is to develop a fast algorithm for approximating the matrix function $f(A)$ of a square matrix $A$ that is symmetric and has hierarchically semiseparable (HSS) structure. Appearing in a wide variety of applications, often in the context of discretized (fractional) differential and integral operators, HSS …