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math.CA2026
Multiple non-collision periodic solutions for second order singular differential systems with parameters
Laura María Fernández-Pardo, Jorge Rodríguez-López
In this paper, new existence and multiplicity results for positive periodic solutions of singular second-order problems under sublinear and superlinear growth assumptions at infini…
math.FA2026
A unified approach to compression-expansion fixed point theorems for operators systems and applications
Laura M. Fernández-Pardo, Jorge Rodríguez-López
In this paper, we present some fixed point theorems for operator systems in the line of Krasnosel'skii's theorem in cones. The cone-compression and cone-expansion type conditions a…