rotating-hill-statio.h

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#include "rotating-hill.h"
struct f: phi { // - d phi/dt
  Float operator() (const point& x) const {
    return (4*nu/t0 - 4*nu*dist2(x,x0t())/sqr(t0+4*nu*t)
     -2*dot(d_x0t_dt(),x-x0t())/(t0+4*nu*t))*phi::operator()(x); }
  f (size_t d1, Float nu1, Float t1=0) : phi(d1,nu1,t1) {}
};