confusable-vision is MIT-licensed. The scored data is CC-BY-4.0. The full technical report, 230-font analysis, and all render artifacts are in the repo. namespace-guard (v0.15.1, zero dependencies, MIT) will integrate these scores in a future release.
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 \(\pi_1(S^1 \times D^2) \cong \mathbb{Z}\).
。搜狗输入法下载对此有专业解读
Jean Smart, Hacks
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