apply_perturbation      Apply a proportional perturbation to a
                        projection matrix
build_target_mask       Build a perturbation target mask
compute_vulnerability   Compute integrated demographic vulnerability
dominant_eigenvalue     Dominant eigenvalue of a projection matrix
grid_scenarios          Enumerate perturbation-grid scenarios
matrix_population_model
                        Matrix population model
perturbation_grid       Perturbation grid
perturbation_grid_from_frequencies
                        Build a perturbation grid from frequencies
population_reduction    Compute percent population reduction
run_grid                Simulate a perturbation grid
simulate_dynamics       Simulate dynamics under a temporally structured
                        perturbation
stable_stage_distribution
                        Stable stage distribution
