m****n
发帖数: 51 | 1 D[F[r],r]=1-U[r] Sin[F[r]]^2 (0=
Initial condition F[0]=0
U[r]=-400 Exp[-r*r/E]/Abs[E]+L*(L+1)/r^2+1-sgn[E]
where L>=0,E is a constant
Is Eq. (1) a stiff ODE? | d***q
发帖数: 1119 | 2 ode23...test it
【在 m****n 的大作中提到】
: D[F[r],r]=1-U[r] Sin[F[r]]^2 (0=: Initial condition F[0]=0
: U[r]=-400 Exp[-r*r/E]/Abs[E]+L*(L+1)/r^2+1-sgn[E]
: where L>=0,E is a constant
: Is Eq. (1) a stiff ODE?
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