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References to 'semiring'
1. Burnside ring by joking
2. divisibility in rings by pahio
3. equivalent regular expressions by CWoo
4. ideal multiplication laws by pahio
5. idempotent semiring by CWoo
6. quantale by CWoo
7. ring of sets by CWoo
8. semifield by CWoo
9. Smarandache n-structure by jonnathan