Lipschitz spectrum preserving mappings on algebras of matrices
Mrčun, Janez
V članku dokažemo, da je Lipschitzova preslikava ▫${\cal T}$▫ na algebri matrik, ki zadošča pogojema ▫${\cal T}(0)=0$▫ in ▫$\sigma ({\cal T}(A)-{\cal T}(B)) \subset \sigma (A-B)$▫, oblike ▫${\cal ...T}(A)=UAU^{-1}$▫ ali pa ▫${\cal T}(A)=UA^t U_{-1}$▫, kjer je ▫$U$▫ neka obrnljiva matrika.
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