Thanks a lot, it's really clear to understand by the help of the website
you share!
Indeed, my problem is this:
1. I have fe which is a FiniteElement class, and I have fe_values which is
a FEValues class. I also have QGauss quadrature to create fe_values.
2. I iterate on every quadrature point
Hi,
it's perfectly fine for a general FE shape functions to be negative at some
points, that's clearly the case for quadratic
http://hplgit.github.io/INF5620/doc/pub/sphinx-fem/._main_fem003.html#fem-approx-fe-fig-p2
Denis.
On Saturday, May 5, 2018 at 3:11:24 AM UTC+2, Zhao Yidong wrote:
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