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).
At full optical zoom, this light fitting at Soho Theatre Walthamstow doesn't bloom or fringe to the extent that most smartphone zooms suffer from.Mat Smith for Engadget
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На шее Трампа заметили странное пятно во время выступления в Белом доме23:05