On 1/30/20 8:45 AM, Andrew Davis wrote:
> I thought the same thing---that 'old_solution' would be a zero vector---but
> when I add the line `std::cout << old_solution << std::endl;` in the function
> IntegrateCell<dim>::operator() (just after the `get_function_values' call in
> the original post) prints a non-zero vector that I expect.
That does not sound credible to me. Can you construct a small example that
does exactly that? I.e., print out, for example, the l2-norm of old_solution
right before the call to fe_values.get_function_values(), and the l2-norm of
old_solution_values right after.
Best
W.
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