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Posted by **Gisvet** on Sunday, June 10, 2012 at 5:38pm.

Is the set of integers paired with the operation § a mathematical system?

- Math -
**MathMate**, Sunday, June 10, 2012 at 6:39pm§9=3

§3=1

Is §1 ∈ Z?

where Z=set of integers, and ∈ ≡ "is in"

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