Same value if you swap any input arguments.
In plain English: the space has no visible holes. If you start walking less and less on each step, you always converge to something that also falls in the space.
One notable example where completeness matters: Lebesgue integral of is complete but Riemann isn't.
Ahh, this dude is just like Ciro Santilli, trying to create the ultimate natural sciences encyclopedia!
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