Proof: Reorder Terms 8
Let's prove the following theorem:
(a ⋅ b) ⋅ (c ⋅ d) = ((a ⋅ c) ⋅ b) ⋅ d
Proof:
# | Claim | Reason |
---|---|---|
1 | ((a ⋅ b) ⋅ c) ⋅ d = (a ⋅ b) ⋅ (c ⋅ d) | ((a ⋅ b) ⋅ c) ⋅ d = (a ⋅ b) ⋅ (c ⋅ d) |
2 | ((a ⋅ b) ⋅ c) ⋅ d = ((a ⋅ c) ⋅ b) ⋅ d | ((a ⋅ b) ⋅ c) ⋅ d = ((a ⋅ c) ⋅ b) ⋅ d |
3 | (a ⋅ b) ⋅ (c ⋅ d) = ((a ⋅ c) ⋅ b) ⋅ d | if ((a ⋅ b) ⋅ c) ⋅ d = (a ⋅ b) ⋅ (c ⋅ d) and ((a ⋅ b) ⋅ c) ⋅ d = ((a ⋅ c) ⋅ b) ⋅ d, then (a ⋅ b) ⋅ (c ⋅ d) = ((a ⋅ c) ⋅ b) ⋅ d |
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