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Published online by Cambridge University Press: 12 February 2019
By "multiplicative inverse eigenvalue problem" (m.i.e.p., for short) we mean the following. Let A be an n×n matrix and let s1,…, sn be n given numbers. Under what conditions does there exist an n×n diagonal matrix V such that VA has eigenvalues s1,…,s n ?
In the "additive inverse eigenvalue problem" (a.i.e.p., for short) we seek the diagonal matrix V so that A + V has eigenvalues s1,…, s n ?.
In the present paper we extend to the m.i.e.p. the ideas used in [7] for the a.i.e.p.
By per X we denote the permanent of the square matrix X.