Re: [Libmesh-users] Questions about shape function and element

[David X. <dx...@my...>]

Roy,

> > So, is the number of nodes in an element unrelated to the order of
> > Lagrange polynomial in libmesh?
>
> Not unrelated - if you want quadratic Lagrange elements, then you need
> second order geometric elements like QUAD9.  However, if you want
> linear elements, then you can still use second order geometric
> elements (to better resolve a curved boundary, for instance).

I'm still not clear about how to match the a geometric element type to
the polynomial type and order that can be applied to this geometric
element. Say, if I want to use EDGE4 for a 1D problem. What are my
choices in terms of the order of Lagrange, Hierarchic, Hermite and
CLOUGH polynomials?

Thanks,

David