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Hello. How are you doing? Well, I hope.
I’m sleepless. Like always. It’s 11.34 PM of April 17. Trust me, it is relevant to the topic I wanna write about.1,183 more words
It is well known result in plane geometry: The maximum number of regions defined by n lines in the plane is R(n) = n(n+1)/2 +1. Of course, there are not any parallel pair from these lines. 220 more words