1.1k citations · 2.4k across the 70 of their papers we have counts for
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math-ph2004★ 60 cited
Unfolding of eigenvalue surfaces near a diabolic point due to a complex perturbation
O. N. Kirillov, A. A. Mailybaev, A. P. Seyranian
The paper presents a new theory of unfolding of eigenvalue surfaces of real symmetric and Hermitian matrices due to an arbitrary complex perturbation near a diabolic point. General…
math-ph2004★ 141 cited
Coupling of eigenvalues of complex matrices at diabolic and exceptional points
A. A. Mailybaev, O. N. Kirillov, A. P. Seyranian
The paper presents a general theory of coupling of eigenvalues of complex matrices of arbitrary dimension depending on real parameters. The cases of weak and strong coupling are di…