Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Results from the first convergence test. Left: errors as a function of the time step size. Right: CPU time (Sec) in evaluating the memory effect at the last time step. (For interpretation of the colors in this figure, the reader is referred to the web version of this article.)
