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Jul 17, 2019 at 4:39 comment added Brian Hopkins I agree that it would helpful to make "these four" explicit. The article is Integers 18 A34, math.colgate.edu/~integers/s34/s34.pdf, which I believe includes just one change of sign example for this situation, equation (4.1).
Jul 4, 2019 at 18:20 comment added YCor It would be nice if these known changes of sign are included, so as to make the question self-contained.
S Jul 4, 2019 at 18:19 history edited YCor CC BY-SA 4.0
formatting; edited tags
Jul 4, 2019 at 18:17 review Suggested edits
S Jul 4, 2019 at 18:19
Jul 4, 2019 at 17:22 history edited David S. Newman CC BY-SA 4.0
added 58 characters in body
Jul 4, 2019 at 17:11 history edited David S. Newman CC BY-SA 4.0
added 58 characters in body
Jul 4, 2019 at 15:11 history asked David S. Newman CC BY-SA 4.0