questions on ODE
- From: kizzienova@xxxxxxxxx
- Date: Sun, 18 Nov 2007 09:52:17 -0800 (PST)
Dear Community,
I'm facing some questions on ODE.
1. Is there an analytical solution to an ode with a rhs which is
nonlinear, e.g. abs(...), sign(...)? I suppose it's easy to consider
for the case of rhs abs(...) the system as two linear ode's, and to
switch for one to another when crossing the abs(...) from - to + and
back. But maybe there are some other possibilities to handle this
problem.
2 Consider a system of ode's. Is it possible to solve a part of the
system analytically,and the other part numerically, e.g. a Euler or
Runge Kutta integration rule. How to combine the analytical an
numerical results into one system. Maybe one can supply me with some
references/examples.
any help is greatly acknowledged.
kindest regards,
kizzie
.
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