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# ç¬¬å…­ç« -å…³ç³»-ä¹

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R 6 1 X 1 Y 1 S 1 1 1 1 X={0 1 1 1 2} Y={0 1 2 1 4} 1 S={ < x 1 y | x+y X Y} 1 2 1 X={1 1 2 1 3 1 4 1 5} 1 Y={1 1 2 1 3} 1 S={ < x 1 y | x=y 2 1 x X 1 y Y} 1 1 1 1 S={ < 0 1 0 0 1 2 2 1 0 } 1 2 1 S={ < 1 1 1 4 1 2 }

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2 1 dom 1 P Q 1 =dom 1 P 1 1 dom 1 Q 1 I x x dom 1 P Q 1 1 y 1 1 x 1 y P Q 1 ⇔5 y 1 1 x 1 y P ∨< x 1 y Q 1 ⇔5 y 1 1 x 1 y P 1 1 y 1 1 x 1 y Q 1 x dom 1 P 1 1 x dom 1 Q 1 x dom 1 P 1 1 dom 1 Q 1 1 dom 1 P Q 1 =dom 1 P 1 1 dom 1 Q 1
3 1 R 1 S j I . R S 1 j 1 R 1 S 1 A 1 R 1 S j A I x 1 1 x 1 x R 1 1 x 1 x S 1 1 x 1 x R S 1 R S  ≠ ♠ 1 R 1 S 1 x 1 y < x 1 y R S ⇔< x 1 y R ∧< x 1 y S ⇔< y 1 x R ∧< y 1 x S 1 R 1 S ⇔< y 1 x R S 1 R S

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R R 1 S n 1 x 1 y y 1 z < x 1 y R S ∧< y 1 z R S ⇔< x 1 y R ∧< x 1 y S ∧< y 1 z R ∧< y 1 z S 1 1 1 x 1 y R ∧< y 1 z R 1 1 1 1 x 1 y S ∧< y 1 z S 1 < x 1 z R ∧< x 1 z S ⇔< x 1 z R S 1 R S ≡ ♠
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ç¬¬å…­ç« -å…³ç³»-ä¹

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