Mathematical notation: end of a proof

Asked Apr 01 '20 at 16:33

Active Apr 01 '20 at 16:33

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What's the difference between $\blacksquare$ and $\Box$ in the end of a proof? I've seen both and I never got the difference.

asked Apr 01 '20 at 16:33

user762249

No, I just want to know the difference between the black one and the white one? I mean, if $\blacksquare$ is the same as QED, then it answers. – user762249 Apr 01 '20 at 16:37
There is no difference, as much as there is no difference, for a real number $a\geqslant0$, between $a^{1/2}$ and $\sqrt a$. – José Carlos Santos Apr 01 '20 at 16:39
None, it's only a matter of choice. You also can type | | or Q.E.D. or Ε.Ο.Δ. – Bernard Apr 01 '20 at 16:40
Ok, thanks. In that case, I'm going to close the question, once there is a question about this. – user762249 Apr 01 '20 at 16:42
No difference. They both look equally ugly. – user21820 Apr 02 '20 at 06:11

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