Quelling ‘Hormuz myopia’
A filled torus (a doughnut) is a 3-manifold homeomorphic to \(S^1 \times D^2\), where \(D^2\) is the 2-dimensional disk. There exists a deformation retract from the doughnut to a circle, so the fundamental group of the doughnut is \(\pi_1(S^1 \times D^2) \cong \mathbb{Z}\).,这一点在同城约会中也有详细论述
21:48, 4 марта 2026Экономика,更多细节参见体育直播
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今年过年期间,我除了给去养老院陪我母亲的亲戚们应有的费用,还给他们送去礼物,给女性亲戚一盒肉食,给男性亲戚一箱啤酒,以示酬谢。