Our aim in this communication is to improve the existing results concerning the stability of x(t) = Ax(t) + Bx(t - tau). It is shown that the unstable characteristic roots could be more accurately located in a bounded and restrictive region of the complex plane. An iterative scheme is presented for numerical implementation of the results. Numerical computations are presented for illustration and comparison with previous results. Copyright (C) 1996 Elsevier Science Ltd.
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IRCCS Ist Ctr San Giovanni di Dio Fatebenefratell, Brescia, ItalyIRCCS Ist Ctr San Giovanni di Dio Fatebenefratell, Brescia, Italy
Marizzoni, Moira
Ferrari, Clarissa
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IRCCS St John God Clin Res Ctr, Brescia, ItalyIRCCS Ist Ctr San Giovanni di Dio Fatebenefratell, Brescia, Italy
Ferrari, Clarissa
Galluzzi, Samatha
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IRCCS Ist Ctr San Giovanni di Dio Fatebenefratell, Brescia, ItalyIRCCS Ist Ctr San Giovanni di Dio Fatebenefratell, Brescia, Italy
Galluzzi, Samatha
Visser, Pieter
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Vrije Univ Amsterdam, Med Ctr, Alzheimer Ctr, Amsterdam, Netherlands
Vrije Univ Amsterdam, Med Ctr, Dept Neurol, Amsterdam, NetherlandsIRCCS Ist Ctr San Giovanni di Dio Fatebenefratell, Brescia, Italy
Visser, Pieter
Parnetti, Lucilla
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Univ Perugia, I-06100 Perugia, ItalyIRCCS Ist Ctr San Giovanni di Dio Fatebenefratell, Brescia, Italy
Parnetti, Lucilla
Nobili, Flavio
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Univ Genoa, Dept Neurosci, Neurol Clin, Genoa, ItalyIRCCS Ist Ctr San Giovanni di Dio Fatebenefratell, Brescia, Italy
Nobili, Flavio
Didic, Mira
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Aix Marseille Univ, Marseille, FranceIRCCS Ist Ctr San Giovanni di Dio Fatebenefratell, Brescia, Italy
Didic, Mira
Bartres-Faz, David
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Univ Barcelona, Barcelona, Spain
IDIBAPS, Barcelona, SpainIRCCS Ist Ctr San Giovanni di Dio Fatebenefratell, Brescia, Italy
Bartres-Faz, David
Fiedler, Ute
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Univ Duisburg Essen, Inst & Clin, Essen, GermanyIRCCS Ist Ctr San Giovanni di Dio Fatebenefratell, Brescia, Italy
Fiedler, Ute
Schonknecht, Peter
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Univ Leipzig, D-04109 Leipzig, GermanyIRCCS Ist Ctr San Giovanni di Dio Fatebenefratell, Brescia, Italy
Schonknecht, Peter
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Payoux, Pierre
Soricelli, Andrea
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IRCCS SDN, Naples, ItalyIRCCS Ist Ctr San Giovanni di Dio Fatebenefratell, Brescia, Italy
Soricelli, Andrea
Tsolaki, Magda
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Aristotle Univ Thessaloniki, GR-54006 Thessaloniki, GreeceIRCCS Ist Ctr San Giovanni di Dio Fatebenefratell, Brescia, Italy
Tsolaki, Magda
Rossini, Paolo
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Policlin Gemelli, Rome, ItalyIRCCS Ist Ctr San Giovanni di Dio Fatebenefratell, Brescia, Italy
Rossini, Paolo
Forloni, Gianluigi
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IRCCS Ist Ric Farmacol, Milan, ItalyIRCCS Ist Ctr San Giovanni di Dio Fatebenefratell, Brescia, Italy
Forloni, Gianluigi
Bordet, Regis
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Univ Lille Nord France, Lille, FranceIRCCS Ist Ctr San Giovanni di Dio Fatebenefratell, Brescia, Italy
Bordet, Regis
Blin, Olivier
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Aix Marseille Univ, CNRS, UMR 7289, Marseille, FranceIRCCS Ist Ctr San Giovanni di Dio Fatebenefratell, Brescia, Italy
Blin, Olivier
Frisoni, Giovanni
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IRCCS San Giovanni di Dio Fatebenefratelli, Brescia, ItalyIRCCS Ist Ctr San Giovanni di Dio Fatebenefratell, Brescia, Italy