20.500.12556/DKUM-84632 A note on star partial order preservers on the set of all variance-covariance matrices Let ▫$H_n^+(\mathbb{R})$▫ be the cone of all positive semidefinite ▫$n \times n$▫ real matrices. We describe the form of all surjective maps on ▫$H_n^+(\mathbb{R})$▫, ▫$n=3$▫, that preserve the star partial order in both directions. preserver star partial order linear model variance-covariance matrix true false true Angleški jezik Ni določen Članek v reviji 2023-07-01 06:47:26 2023-07-10 13:26:49 2023-07-11 03:08:49 0000-00-00 00:00:00 2023 0 0 str. 263-273 no. 1 Vol. 73 Feb. 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 512.643:517.983 143109123 10.1515/ms-2023-0022 0139-9918 RAZ_Dolinar_Gregor_2023.pdf RAZ_Dolinar_Gregor_2023.pdf 1 E845AB9DA16A2C3206FCE0F914B1D04E 310d71c7c9bfdba1945282063131482f7203cc0ef25ba394e031d72da16ea6e0 dff30273-1f18-11ee-b08f-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=168655 https://www.degruyter.com/document/doi/10.1515/ms-2023-0022/html 1 60c13ad2-17ca-11ee-a526-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=168437 Ekonomsko-poslovna fakulteta 0 0 0