Let $(\mathbb T^2,g)$ be a Riemannian two-torus and let $\sigma$ be anoscillating $2$-form on $\mathbb T^2$. We show that for almost every smallpositive number $k$ the magnetic flow of the pair $(g,\sigma)$ has infinitelymany periodic orbits with energy $k$. This result complements the analogousstatement for closed surfaces of genus at least $2$ [Asselle and Benedetti,Calc. Var. Partial Differential Equations, 2015] and at the same time extendsthe main theorem in [Abbondandolo, Macarini, Mazzucchelli, and Paternain, J.Eur. Math. Soc. (JEMS), to appear] to the non-exact oscillating case.
展开▼
机译:假设$(\ mathbb T ^ 2,g)$是黎曼二重奏,并且让$ \ sigma $使$ \ mathbb T ^ 2 $上的2 $-形式振荡。我们表明,几乎对于每个小的正数$ k $,对$(g,\ sigma)$的磁流都具有无限多个具有能量$ k $的周期性轨道。该结果补充了至少2美元的闭合类属的相似陈述[Asselle和Benedetti,Calc。变体偏微分方程,2015],同时扩展了[Abbondandolo,Macarini,Mazzucchelli,和Paternain,J.Eur。数学。 Soc。 (JEMS),出现在非精确振荡的情况下。
展开▼