Definition 4 (Definition: Fundamental Group) Let \(X\) be a topological space and \(x_0 \in X\) a basepoint. A loop based at \(x_0\) is a continuous map \(\gamma: [0,1] \to X\) with \(\gamma(0) = \gamma(1) = x_0\). Two loops \(\gamma, \delta\) are homotopic relative to \(x_0\) (written \(\gamma \simeq \delta\)) if there exists a continuous map \(H: [0,1] \times [0,1] \to X\) such that \[H(s,0) = \gamma(s), \quad H(s,1) = \delta(s), \quad H(0,t) = H(1,t) = x_0\] for all \(s,t \in [0,1]\). This is an equivalence relation; denote the equivalence class of \(\gamma\) by \([\gamma]\).
The DJI Romo robot vacuums. | Image: DJI，更多细节参见新收录的资料
ВсеПолитикаОбществоПроисшествияКонфликтыПреступность，详情可参考新收录的资料
a boolean to its integer representation:，推荐阅读新收录的资料获取更多信息
2.超过500总吨的船舶，500总吨以下部分适用本项第1目的规定，500总吨以上的部分，应当增加下列数额：