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revised What exactly is a differential?
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comment Express unit sphere as countable union of great circles?
@Misakov The version I state is equivalent to yours if you replace union with intersection (see e.g. here. In your other comment, if you replace dense with open dense in the conclusion then yes, it seems to me that you can argue like that.
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comment Express unit sphere as countable union of great circles?
@Misakov I elaborated on this hint. Maybe it helps you answer your comment here.
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answered Express unit sphere as countable union of great circles?
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comment $p$-adic completion of integers
@user135520 Which sequence are you talking about? It's quite some time since I wrote this post...
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revised Weak convergence in $D^{1,p}(\mathbb{R}^n)$ and in $\mathcal{M}(\mathbb{R}^n)$
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