In this paper, we study a class of nonlinear differential equations with multiple distributed
delays. We reduced the problem of search for periodic solutions of the distributed delay …

This paper introduces a novel iteration inequality for the Maslov-type (L, P)-index of iterated
symplectic paths. Here, P is a fixed 2n-dimensional symplectic and orthogonal matrix …

In this paper, we prove the existence of non-radial solutions to the problem-▵ u= f (x, u), u|∂
Ω= 0 on the unit ball Ω:={x∈ R 3:‖ x‖< 1} with u (x)∈ R s, where f is a sub-linear …

We study the existence of subharmonic solutions in the system¨ u (t)= f (t, u (t)) with u (t)∈ R
k, where f (t, u) is a continuous map that is p-periodic and even with respect to t and odd and …

IIMAS UNAM 2022 Page 1 IIMAS UNAM Instituto de Investigaciones en Matemáticas Aplicadas
y en Sistemas Universidad Nacional Autónoma de México Dr. Ramsés Humberto Mena …