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1. PRESERVERS ON THE SET OF VARIANCE-COVARIANCE MATRICES Iva Golubić, 2021, doctoral dissertation Keywords: linear model, preserver, generalized inverse, variance-covariance matrix, positive semidefinite matrix, L{\"{o}}wner partial order, minus partial order, star partial order |
2. A geometric view on inner transformation between the variables of a linear regression model Zhaoyang Li, Boštjan Antončič, 2021, original scientific article Keywords: econometrics, regression analysis, matrix singular value decomposition, Moore-Penrose generalized inverse, matrix inner transformation |