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math.NA2021
On non-Hermitian positive (semi)definite linear algebraic systems arising from dissipative Hamiltonian DAEs
Candan Güdücü, Jörg Liesen, Volker Mehrmann +1
We discuss different cases of dissipative Hamiltonian differential-algebraic equations and the linear algebraic systems that arise in their linearization or discretization. For eac…
math.NA2021
A posteriori superlinear convergence bounds for block conjugate gradient
Christian E. Schaerer, Daniel B. Szyld, Pedro J. Torres
In this paper, we extend to the block case, the a posteriori bound showing superlinear convergence of Conjugate Gradients developed in [J. Comput. Applied Math., 48 (1993), pp. 327…