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Mathematica > Matrix Decompositions >

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HessenbergDecomposition

HessenbergDecomposition[m]
gives the Hessenberg decomposition of a matrix m.

The result is given in the form {p, h} where p is a unitary matrix such that p.h.Conjugate[Transpose[p]]m.

Find the Hessenberg decomposition of a 4×4 matrix:

Out[2]//MatrixForm=

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