pism

[fork] customized build of PISM, the parallel ice sheet model (tillflux branch)
git clone git://src.adamsgaard.dk/pism # fast
git clone https://src.adamsgaard.dk/pism.git # slow
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advection.mac (204B)

      1 E(z,t) := sin(%pi / H * (z - w * t));
      2 
      3 eq: 'diff('E(z,t), t) + w * 'diff('E(z,t), z) = 0;
      4 
      5 Q[0] : subst([z = 0], diff(E(z,t), z));
      6 
      7 Q[H] : subst([z = H], diff(E(z,t), z));
      8 
      9 e[0] : E(0, t);
     10 e[H] : E(H, t);