Introduces integrability notions for C0/C1 natural Hamiltonian systems and gives Liouville-Arnold theorem prototypes, motivated by bungee-jumping models.
Monodromy in the resonant swing spring
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abstract
This paper shows that an integrable approximation of the spring pendulum, when tuned to be in $1:1:2$ resonance, has monodromy. The stepwise precession angle of the swing plane of the resonant spring pendulum is shown to be a rotation number of the integrable approximation. Due to the monodromy, this rotation number is not a globally defined function of the integrals. In fact at lowest order it is given by $\arg(a+ib)$ where $a$ and $b$ are functions of the integrals. The resonant swing spring is therefore a system where monodromy has easily observed physical consequences.
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math.DS 1years
2026 1verdicts
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From bungee to $C^1$ and $C^0$ Hamiltonian systems and their integrability and nonintegrability
Introduces integrability notions for C0/C1 natural Hamiltonian systems and gives Liouville-Arnold theorem prototypes, motivated by bungee-jumping models.