
Accession Number : AD0776273
Title : HighlyStable Multistep Methods for Retarded Differential Equations.
Descriptive Note : Technical rept.,
Corporate Author : WISCONSIN UNIV MADISON DEPT OF COMPUTER SCIENCES
Personal Author(s) : Cryer,Colin W.
Report Date : SEP 1973
Pagination or Media Count : 34
Abstract : A linear multistep method (rho, sigma) is defined to be D(A sub 0)stable if when it is applied to the delay differential equation dy/dt(t) = mu y(ttau) the approximate solution (y sub h)(t sub n) nears 0 as n nears infinity for all mu epsilon(o,pi/2 tau) and all stepsized h of the form h = tau/m, m a positive integer. General properties of D(A sub 0)stable methods are derived. These properties are similar to the properties of Astable and A(alpha)stable methods, for example, it is proved that a kstep D(A sub 0)stable method or order k must be implicit. As an application it is shown that the trapezoidal method is D(A sub 0)stable. Finally, the condition that h = tau/m is dropped and the resulting methods, which the author calls GD(A sub 0)stable methods, are studied. (Author)
Descriptors : *Differential equations, Numerical analysis, Theorems, Time lag theory
Subject Categories : Numerical Mathematics
Distribution Statement : APPROVED FOR PUBLIC RELEASE