How to check and calculate the eigen value and eigen vector of a given matrix?

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jaya shukla el 13 de Jul. de 2015

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https://es.mathworks.com/matlabcentral/answers/229683-how-to-check-and-calculate-the-eigen-value-and-eigen-vector-of-a-given-matrix

Comentada: Azzi Abdelmalek el 13 de Jul. de 2015

How to check that the given matrix is positive semidefinite or not and how to calculate the eigen values and eigen vectors for the given matrix A= [1 -1 0 0; -1 2 -1 0; 0 -1 2 -1; 0 0 -1 1]. When I am Using the eig function of Matlab one eigen value is coming -0 i.e negative.