this post was submitted on 01 Feb 2024
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addition rule (lemmy.world)
submitted 9 months ago by affiliate@lemmy.world to c/196@lemmy.blahaj.zone
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[โ€“] bort@feddit.de 11 points 9 months ago (1 children)

what's with the square at the end? isn't that usually for proofs?

[โ€“] affiliate@lemmy.world 14 points 9 months ago

yeah but sometimes when the textbook authors are feeling particularly mischievous they'll just put them in random places. and sometimes they'll even skip the proofs but keep the square.