estimate_gul_loadings   General unilateral load Estimator
g_fun                   Smooth link functions compliant with Theorems
                        9&10
g_theorem               Simulation wrapper for Theorems 9 & 10
generate_gfm_data       Generate general factor model with smooth
                        latent transformation
gul_simulation          Single-replication GUL simulation
loading_metrics         Multi-metric evaluation of factor loading
                        matrix estimation error
verify_mean             Verify zero-mean preservation (Theorem 10
                        assumption 2a)
verify_subgaussian      Verify sub-Gaussian preservation
