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Just woke up after a short sleep. I am sure...

Posted by griffith on Saturday, July 10 2021 at 00:08:52AM
In reply to It is possible posted by Hajduk on Friday, July 09 2021 at 7:39:08PM

...that I have read about a Klein bottle, and I suspect that it was in a book that I have somewhere, a book on an imaginary fourth spatial dimension. I must check on it after I have slept many, many hours more.

The summer here has been exceptional, every day has been hot since the beginning of June, and the nights are humid and too warm, it is difficult to sleep well.


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