A detailed structured backward error analysis for four kinds of Palindromic Polynomial Eigenvalue Problems (PPEP)where ⋆ is one of the two actions: transpose and conjugate transpose, and ε ∈ {±1}. Each of them has its application background with the case ⋆ taking transpose and ε = 1 attracting a great deal of attention lately because of its application in the fast train modeling.
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