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).
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Regent honeyeaters were once seen in vast flocks across south-eastern Australia, with a distribution that ranged from Queensland to Kangaroo Island in South Australia.
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Раскрыты подробности о договорных матчах в российском футболе18:01，更多细节参见体育直播