The infinitely stacked world \(D^2 \times \mathbb{R}^2\) is the universal cover of Bobs world \(S^1 \times D^2\), as it is simply connected and covers Bobs world (see the definition of universal cover above).
Фигурантам дела о покушении на генерала Алексеева присвоили новый статусВ Москве фигурантов покушения на генерала Алексеева признали экстремистами
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