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Adjacency preserving mappings of 2 × 2 Hermitian matrices

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Summary.

We determine all mappings φ from the space of 2 × 2 Hermitian matrices which take pairs of adjacent matrices to pairs of adjacent matrices and such that the image of φ contains two matrices which are not adjacent.

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Authors and Affiliations

  1. Department Mathematik, Schwerpunkt GD, Universität Hamburg, Bundesstr. 55, D-20146, Hamburg, Germany

    Wen-ling Huang

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  1. Wen-ling Huang
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Correspondence to Wen-ling Huang.

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Dedicated to Professor Dr. Dr. h.c. Walter Benz on the occasion of his 75th birthday

Manuscript received: May 10, 2006 and, in final form, November 2, 2006.

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Huang, Wl. Adjacency preserving mappings of 2 × 2 Hermitian matrices. Aequ. math. 75, 51–64 (2008). https://doi.org/10.1007/s00010-007-2879-5

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  • DOI: https://doi.org/10.1007/s00010-007-2879-5

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