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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 note on star partial order preservers on the set of all variance-covariance matrices Gregor Dolinar, Bojan Kuzma, Janko Marovt, Dijana Mosić, 2023, original scientific article Keywords: preserver, star partial order, linear model, variance-covariance matrix |