SOLUTION: In general, what must be true about a number for there to be two lattice points that exact distance apart?

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Question 1014828: In general, what must be true about a number for there to be two lattice points that exact distance apart?

Answer by ikleyn(52800) About Me  (Show Source):
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In general, what must be true about a number for there to be two lattice points that exact distance apart?
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The word "lattice" is multi-functioning.

It has many meanings (see Wikipedia, for example).

What is "the lattice" in your case?

What do you mean?