Δt

Δx

${\Vert .\Vert }_2$

COS

${\Vert .\Vert }_{\infty }$

COS

1/10

1/15

0.0455637460106

0.0206037934344

1/40

1/30

0.0136296111988

1.74114195458324

0.0043408515398

2.246859993971

1/160

1/60

0.0042681481212

1.67506225886374

0.0009528489608

2.187658631184

1/640

1/120

0.0013767764693

1.63231589868382

0.0002160284100

2.141026491177