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Re: Working on bvp4c
From: |
lakerluke |
Subject: |
Re: Working on bvp4c |
Date: |
Mon, 22 Aug 2016 00:44:21 -0700 (PDT) |
Bill Greene-3 wrote
> The user is required to provide the initial values for *all* the
> components in Y as solinit.y. That initial guess and the function defining
> Phi is all the KINSOL solver needs to find the Y that satisfies 4.1.
>
> Bill
Right, I see. So, for example, in the simple SHM ODE I pictured in my
previous post, only the derivative of y is known at the initial value, I
must therefore, as the user, provide a guess for the entire system at all
mesh values. In matlab, this is typically performed by the helper function
bvpinit.
However, in forming the global jacobian in 4.1, we need to evaluate f at mid
point mesh values, x_{i - 1/2}. Does this mean we also need to provide a
guess for the solution at these mid points? How else can we find the value
of f_{i - 1/2}?
--
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- Re: Working on bvp4c, lakerluke, 2016/08/03
- Re: Working on bvp4c, c., 2016/08/03
- Re: Working on bvp4c, c., 2016/08/12
- Re: Working on bvp4c, Bill Greene, 2016/08/15
- Re: Working on bvp4c, lakerluke, 2016/08/20
- Re: Working on bvp4c, Bill Greene, 2016/08/20
- Re: Working on bvp4c,
lakerluke <=
- Re: Working on bvp4c, Bill Greene, 2016/08/22
- Re: Working on bvp4c, lakerluke, 2016/08/22
- Re: Working on bvp4c, Bill Greene, 2016/08/22
- Re: Working on bvp4c, lakerluke, 2016/08/23
- Re: Working on bvp4c, Bill Greene, 2016/08/27
- Re: Working on bvp4c, Nicholas Jankowski, 2016/08/27
- Re: Working on bvp4c, c., 2016/08/30