Keith Brian Johnson's Discussions (115)

Discussions Replied To (13) Replies Latest Activity

"Do you have in mind that all open subsets may be expressed as the union of disjoint…"

Keith Brian Johnson replied Apr 19 to Puzzle in real analysis

4 Apr 19
Reply by Luara

"(a,b) U [b,c) is an open subset, too. Are you defining a subclass of open intervals…"

Keith Brian Johnson replied Apr 19 to Puzzle in real analysis

4 Apr 19
Reply by Luara

"I'll happily grant that the Abel sum matches the usual sum (I assume you mean the su…"

Keith Brian Johnson replied Mar 2 to 1+2+3+4+5+... = -1/12

16 Mar 4
Reply by Luara

"I'm sorry to say that I never learned enough about analytic continuation or about th…"

Keith Brian Johnson replied Feb 28 to 1+2+3+4+5+... = -1/12

16 Mar 4
Reply by Luara

"I would buy this: 1 - 1/4 + 1/16 - 1/64 + 1/256 -+... = 1/ (1 + 1/4) = 4/5 1 - 1/2 +…"

Keith Brian Johnson replied Feb 28 to 1+2+3+4+5+... = -1/12

16 Mar 4
Reply by Luara

"OK, two things: First, we have to go back further than that particular series, becau…"

Keith Brian Johnson replied Feb 26 to 1+2+3+4+5+... = -1/12

16 Mar 4
Reply by Luara

"I'm sorry--I didn't realize there was a video I was supposed to watch. I see it now.…"

Keith Brian Johnson replied Feb 26 to 1+2+3+4+5+... = -1/12

16 Mar 4
Reply by Luara

"Why would anyone ever use such an obviously ridiculous sum instead of saying, "Wait…"

Keith Brian Johnson replied Feb 26 to 1+2+3+4+5+... = -1/12

16 Mar 4
Reply by Luara

"Was the first line's sum supposed to be 1 - 2 + 3 - 4 + 5 - 6 + 7 -+ = -1/12?"

Keith Brian Johnson replied Feb 15 to 1+2+3+4+5+... = -1/12

16 Mar 4
Reply by Luara

"I wish I had known someone like you when I was taking analysis at Penn State. Maybe…"

Keith Brian Johnson replied Jan 5 to Speaking of math errors ...

3 Jan 5
Reply by Luara

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