pub fn eigsh_with_initial_subspace<O>(
operator: &O,
options: EigshOptions,
initial_subspace: &[Vec<Complex64>],
) -> Result<Eigensystem>where
O: LinearOperator + ?Sized,Expand description
Solve from a complete user-supplied initial subspace.
Related parameter points should pass all previously converged target vectors here. The thick-restart backend preserves the subspace as a subspace, so rotations inside a degenerate multiplet do not discard useful information.