You can run Notebook example on Biner, if you run it on binder Interact will not work, 
- Implement Bezier elements method.
- Implement IEN matrix
- Implement ID matrix
- Implement Bezier extraction operator
- Extend to the non square case, i.e S.p not equal to S.q
- Implement Poisson problem in Galerkin formulation for Bezier elements.
- Implement Coeff. function and Symbolic Integrator.