Variance The Estimation Eigen Value of Principal Component Analysis and Nonlinear Principal Component AnalysisMakkulau, Andi Tenri Ampa, Irma Yahya, Lilis La Ome and La Ode SaidiITM Web Conf., 58 (2024) 04001DOI: https://doi.org/10.1051/itmconf/20245804001