conatus.expert.NLBVP¶

class conatus.expert.NLBVP(variables, *, name=None, symmetry=None, namespace=None)[source]¶

Bases: Problem

Nonlinear boundary value problem F(X) = 0, F = LHS - RHS; any term may be nonlinear.

There is no implicit/explicit split: Newton (conatus.solvers.nlbvp) linearizes every term with the IR’s Fréchet derivative. dt() is refused (steady problems only).

Parameters:

variables (tuple[Field, ...])
name (str | None)
symmetry (SymmetrySubspace | None)
namespace (Any)

kind = 'NLBVP'¶

nonlinear_variables()[source]¶

Variables entering at least one term that is not linear homogeneous.

Return type:: tuple[Field, …]