SIAM Journal on Numerical Analysis, Vol. 15, No. 5 (Oct., 1978), pp. 1008-1029 (22 pages) In the rational Padé approximation to exp (-q), q ϵ ℂ, the parameters in the numerator and denominator are ...

Matrix functions, such as the exponential, square root and cosine, play an indispensable role in various fields including quantum mechanics, control theory and numerical solution of differential ...

Multivariate approximation in Hilbert spaces is a rapidly evolving field that addresses the challenges of approximating functions of several variables in settings where the underlying function spaces ...

This is a preview. Log in through your library . Abstract We analyze the convergence of an extended Krylov subspace method for the approximation of operator functions that appear in exponential ...