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Please, someone, explain what the // in the hint below stands for:

"Show that the numbers of the form

±m√2/n

for m, n ∈ N are dense."

Hint:

"To find a number in (x, y), find a rational in (x//√2, y//√2). Conclude from this that the set of

all (irrational) numbers of the form ±m√2/n is dense."

Thank you in advance.

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# Dense numbers

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