SOBRE UN TIPO DE MATRICES NO SIMÉTRICAS CON VALORES PROPIOS QUE SON ENTEROS POSITIVOS
SOBRE UN TIPO DE MATRICES NO SIMÉTRICAS CON VALORES PROPIOS QUE SON ENTEROS POSITIVOS
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DOI: 10.22533/at.ed.3173282323085
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Palavras-chave: matriz no simétrica, valores propios, forma canónica de Jordan
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Keywords: nonsymetric matrix, eigenvalues, canonical Jordan form
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Abstract: A type of nonsymmetric square matrices with real entries, such that they have positive integer eigenvalues are considered. The first given matrix has 6 rows and 6 columns, with three different eigenvalues with double multiplicity. That matrix can be diagonalized. The second matrix has size 8 x 8, with also three different eigenvalues, two of them with double multiplicity, and the other one with multiplicity equal to 4. This matrix can also be diagonalized. However, the third considered matrix, with 10 rows and 10 columns, is not equivalent to a diagonal matrix. That matrix has three eigenvalues, two of them with double multiplicity, and the other one with multiplicity equal to 6. The fourth given matrix, of size 12 x 12, also with three eigenvalues, two of them with double multiplicity, and the other one with multiplicity equal to 8. This matrix can neither be diagonalized. For this last two matrices, its canonical Jordan form is built. Having found a pattern on the multiplicity of eigenvalues, the form of characteristic polynomial of matrix with studied structure, of size 20 x 20 allows to state that this matrix has also positive integer eigenvalues.
- Francisco Javier Sanchez Bernabe