In the present paper, the
following is proved:
Theorem. Let a1,⋯,am be m distinct, nonzero residues modulo n, where n is any
natural number and where
where c > 0 is some large constant. Then the congruence
is solvable with 𝜖i = 0 or 1 and not all 𝜖i = 0.
The method of proof is completely elementary, in that it is based upon
well-known results concerning the addition of residues modulo a natural number n
and upon results from elementary number theory.
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