semiring
半環
Ring of sets – Family closed under unions and relative complements
Valuation algebra – Algebra describing information processing
/suto3/google.iconsemiring
/suto3/Google画像検索.iconsemiring
/suto3/Google定義検索.icon semiring
/suto3/wikipedia.iconsemiring
/suto3/weblio.icon semiring
/suto3/kotobank.icon semiring
/suto3/jisho.icon semiring