Approximation Of Boundary Conditions At Infinity For A Harmonic Equation
De-Hao Yu 11 Computing Center, Academia Sinica, China
Received 1984-7-26 Revised Online 2006-11-19
Starting from the canonical boundary reduction, this paper studies an approximate differential boundary condition and an approximate integral boundary condition on an artificial doundary for the exterior problem of a harmonic equation, and gives an error estimate for the latter. This estimate reveals the relationship between the error and the approximate grade boundary conditions as well as the radius fo the artificial boundary.