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Characteristic functions and Hamilton-Cayley theorem for left eigenvalues of quaternionic matrices - MaRDI portal

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Characteristic functions and Hamilton-Cayley theorem for left eigenvalues of quaternionic matrices

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Publication:6502748

arXiv1005.0474MaRDI QIDQ6502748

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Abstract: We introduce the notion of characteristic function of a quaternionic matrix, whose roots are the left eigenvalues. We prove that for all 2imes2 matrices and for 3imes3 matrices having some zero entry outside the diagonal there is a characteristic function which is a polynomial. For the other 3imes3 matrices the characteristic function is a rational function with one point of discontinuity. We prove that Hamilton-Cayley theorem holds in all cases.





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