Prove that there is a positive integer that equals the sum of the positive integers not exceeding it. Is your proof constructive or nonconstructive.

Question

jamesj · Answer

Well 3 = 2 + 1.  And as we have explicitly constructed an example here, it is constructive, rather than making a more theoretical argument that the converse is false.

anonymous · Answer

Man I just found it, after one hour of thinking, talk about overthinking! You should see my scrap paper lol.

jamesj · Answer

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