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The dichotomy spectrum approach for a global nonuniform asymptotic stability problem: Triangular case via uniformization

Published online by Cambridge University Press:  12 September 2025

Álvaro Castañeda*
Affiliation:
Departamento de Matemáticas, Universidad de Chile , Casilla 653, Santiago 7800024, Chile
Ignacio Huerta
Affiliation:
Departamento de Matemática, Universidad Técnica Federico Santa María , Casilla 110-V, Valparaíso 2340000, Chile e-mail: ignacio.huertan@usm.cl grobledo@uchile.cl
Gonzalo Robledo
Affiliation:
Departamento de Matemáticas, Universidad de Chile , Casilla 653, Santiago 7800024, Chile

Abstract

We introduce a new conjecture of global asymptotic stability for nonautonomous systems, which is fashioned along the nonuniform exponential dichotomy spectrum and whose restriction to the autonomous case is related to the classical Markus–Yamabe Conjecture: we prove that the conjecture is fulfilled for a family of triangular systems of nonautonomous differential equations satisfying boundedness assumptions. An essential tool to carry out the proof is a necessary and sufficient condition ensuring the property of nonuniform exponential dichotomy for upper block triangular linear differential systems. We also obtain some byproducts having interest on itself, such as the diagonal significance property in terms of the above-mentioned spectrum.

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Article
Copyright
© The Author(s), 2025. Published by Cambridge University Press on behalf of Canadian Mathematical Society

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