We consider one-dimensional Schrödinger operators with almost periodic potentials and \(\delta \)-interactions supported on an almost periodic point set and with almost periodic coefficients. For operators of this kind we introduce a rotation number in the spirit of Johnson and Moser.

中文翻译：

---

具有 $$\delta $$ δ -Potentials 的几乎周期 Schrödinger 算子的旋转数

我们考虑一维薛定谔算子，其具有几乎周期性的势和\(\delta \) -相互作用支持在几乎周期性的点集和几乎周期性的系数上。对于此类操作员，我们本着 Johnson 和 Moser 的精神引入了轮换次数。