Geodesic
Semicontinuity of majorants and minorants of Lyapunov exponents as functions of a complex parameter
Vestnik Moskovskogo universiteta. Matematika, mehanika, no. 1 (2018), pp. 63-67 
A. N. Vetokhin. Semicontinuity of majorants and minorants of Lyapunov exponents as functions of a complex parameter. Vestnik Moskovskogo universiteta. Matematika, mehanika, no. 1 (2018), pp. 63-67. http://geodesic.mathdoc.fr/item/VMUMM_2018_1_a9/
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     title = {Semicontinuity of majorants and minorants of {Lyapunov} exponents as functions of a complex parameter},
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Voir la notice de l'article provenant de la source Math-Net.Ru

A parametric family of linear differential systems with continuous coefficients bounded on the semi-axis and analytically dependent on a complex parameter is considered. It is established that the majorant (minorant) of the Lyapunov exponent considered as a function of the parameter is upper (lower) semi-continuous.

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