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Proof

(related to Corollary: General Commutative Law)

• The general commutative law follows immediately from the commutativity property, using it repeatedly.
• This holds only if the number of elements is finite. For a counterexample see for instance rearrangement of convergent series.
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References

Bibliography

1. Knauer Ulrich: "Diskrete Strukturen - kurz gefasst", Spektrum Akademischer Verlag, 2001