Loading [MathJax]/extensions/TeX/boldsymbol.js
\newcommand{\uex}{{u_{\small\mbox{e}}}}
\newcommand{\half}{\frac{1}{2}}
\newcommand{\tp}{\thinspace .}
\newcommand{\Oof}[1]{\mathcal{O}(#1)}
Movie of the phase error
u^{\prime\prime} + \omega^2 u = 0 , u(0)=1 , u^{\prime}(0)=0 ,
\omega=2\pi , \uex(t)=\cos (2\pi t) , \Delta t = 0.05 (20 intervals
per period)