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Title:Linearni ohranjevalci komutativnosti
Authors:ID Radić, Gordana (Author)
ID Petek, Tatjana (Mentor) More about this mentor... New window
Files:.pdf MAG_Radic_Gordana_2014.pdf (668,58 KB)
MD5: E3DA31397540A76DD50E3DDFC054CB57
 
Language:Slovenian
Work type:Master's thesis
Typology:2.09 - Master's Thesis
Organization:FNM - Faculty of Natural Sciences and Mathematics
Abstract:Linearni ohranjevalci komutativnosti na matrični algebri so tesno povezani s preslikavami, ki vse matrike ranga 1 preslikajo v matrike ranga 1. Zato najprej določimo obliko linearnih preslikav, ki ohranjajo rang 1, nato pa natančno opišemo nesingularne linearne preslikave na algebri kvadratnih matrik z elementi iz algebraično zaprtega polja F s karakteristiko 0. Z močnejšo predpostavko, da preslikava ohranja komutativnost v obe smeri, vendar sedaj brez predpostavke surjektivnosti, dobimo podoben rezultat. Linearne preslikave, ki ohranjajo komutativnost oziroma ohranjajo komutativnost v obe smeri, proučimo tudi na algebri zgoraj trikotnih matrik nad poljubnim poljem in na realni (jordanski) algebri hermitskih kompleksnih matrik. V slednjem primeru dobimo karakterizacijo celo brez predpostavke surjektivnosti in z ohranjanjem komutativnosti samo v eno smer.
Keywords:linearna preslikava, ohranjanje ranga 1, ohranjanje komutativnosti, ohranjanje komutativnosti v obe smeri, hermitske matrike, zgoraj trikotne matrike
Place of publishing:Maribor
Publisher:[G. Radić]
Year of publishing:2014
PID:20.500.12556/DKUM-43968 New window
UDC:512.645.5(043.2)
COBISS.SI-ID:20454152 New window
NUK URN:URN:SI:UM:DK:4OWQFZ35
Publication date in DKUM:03.04.2014
Views:2420
Downloads:176
Metadata:XML DC-XML DC-RDF
Categories:FNM
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Secondary language

Language:English
Title:Linear commutativity preservers
Abstract:Linear commutativity-preservers on matrix algebra are linked to linear maps which map every rank-one matrix to a rank-one matrix. So, firstly we develope the structure of linear maps that preserve rank 1. After that we describe all non-singular linear maps on the algebra of all square matrices over an algebraically closed field F with characteristic 0. Furthermore, by modifying the hypothesis and leaving out the non-singularity, we arrive to the similar conclusion. In this case, the stronger assumption is needed, which is preserving commutativity in both directions. We also consider linear maps that preserve commutativity in one or in both directions on the algebra of all upper-triangular matrices over any field and on the real (jordan) algebra of all complex self-adjoint matrices. In second case, the characterization is obtained without non-singularity assumption and preserving commutativity in one direction only.
Keywords:Linear maps, Rank 1 preserving maps, Commutativity preserving maps, Commutativity in both directions preserving maps, Hermitian matrices, Upper triangular matrices


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