Base Linear Solver Class

class LinearSolverInterface

Bases: ABC

This is the base class for linear solvers that work with the interior point algorithm. Derived classes must implement the following abstract methods:

• do_symbolic_factorization

• do_numeric_factorization

• do_back_solve

• get_inertia

abstractmethod do_symbolic_factorization(matrix, raise_on_error=True, timer=None)

Perform symbolic factorization with the nonzero structure of the matrix.

abstractmethod do_numeric_factorization(matrix, raise_on_error=True, timer=None)

Factorize the matrix. Can only be called after do_symbolic_factorization.

abstractmethod do_back_solve(rhs)

Solve the linear system matrix * x = rhs for x. Can only be called after do_numeric_factorization.

abstractmethod get_inertia()

Get the inertia of the factorized matrix. Can only be called after do_numeric_factorization.