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- W4287687989 abstract "We study the existence of subharmonic solutions in the system $ddot {u}(t)=f(t,u(t))$, where $u(t)inmathbb{R}^{k}$ and $f$ is an even and $p$-periodic function in time. Under some additional symmetry conditions on the function $f$, the problem of finding $mp$-periodic solutions can be reformulated in a functional space as a $Gammatimesmathbb{Z}_{2}times D_{m}% $-equivariant equation, where the group $Gammatimesmathbb{Z}_{2}$ acts on the space $mathbb{R}^{k}$ and $D_{m}$ acts on $u(t)$ by time-shifts and reflection. We apply Brouwer equivariant degree to prove the existence of an infinite number of subharmonic solutions for the function $f$ that satisfies additional hypothesis on linear behavior near zero and the Nagumo condition at infinity. We also discuss the bifurcation of subharmonic solutions when the system depends on an extra parameter." @default.
- W4287687989 created "2022-07-26" @default.
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- W4287687989 date "2020-08-18" @default.
- W4287687989 modified "2023-09-23" @default.
- W4287687989 title "Subharmonic Solutions In Reversible Non-Autonomous Differential Equations" @default.
- W4287687989 hasPublicationYear "2020" @default.
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