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How to prove the arithmetic equality `3 * S (i + j) + 1 = S (3 * i + 1) + S (3 * j + 1)` in Coq?

Author Votes Δ
Anton Trunov 6 +0.47
ejgallego 4 -2.45
Last visited: Feb 18, 2017, 5:34:07 AM