Россиянам раскрыли способ упаковки вещей в ручную кладь по методу «судоку»20:51
The new 13- and 15-inch MacBook Airs have the same speedy M5 processor as last fall's 14-inch MacBook Pro. They now start with 512GB of storage, and they're configurable with up to 4TB for the first time.
。safew官方版本下载是该领域的重要参考
Силовые структуры
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 \([\gamma]\).