On commuting matrices in max algebra and in classical nonnegative algebra |
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Authors: | Ricardo D. Katz Hans Schneider Sergeı˘ Sergeev |
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Affiliation: | 1. CONICET, Instituto de Matemática “Beppo Levi”, Universidad Nacional de Rosario, Avenida Pellegrini 250, 2000 Rosario, Argentina;2. Department of Mathematics, University of Wisconsin-Madison, Madison, WI 53706, USA;3. University of Birmingham, School of Mathematics, Watson Building, Edgbaston B15 2TT, UK |
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Abstract: | This paper studies commuting matrices in max algebra and nonnegative linear algebra. Our starting point is the existence of a common eigenvector which directly leads to max analogs and nonnegative analogs of some classical results for complex matrices. We also investigate Frobenius normal forms of commuting matrices, particularly when the Perron roots of the components are distinct. For the case of max algebra, we show how the intersection of eigencones of commuting matrices can be described and we consider connections with Boolean algebra which enables us to prove that two commuting irreducible matrices in max algebra have a common eigennode. |
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