This class represents a variational equation lhs == rhs. The equation can be either linear or nonlinear:
- Linear (a == L), in which case a must be a bilinear form and L must be a linear form.
- Nonlinear (F == 0), in which case F must be a linear form.
Create equation a == L
Create equation F == 0
Check whether equation is linear
Return form for left-hand side
Return form for right-hand side
Return value for right-hand side
The membership flag