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Which ordered pairs need to be added to the universal relationp = X^2on the set X = {a,b,c,d} to create the transitive closure p^t of p? A (a,a) B (a,b) C (a,c) D (a,d) E (b,a) F (b,b) G (b,c) H (b,d) I (c,a) J (c,b) K (c,c) L (c,d) M (d,a) N (d,b) O (d,c) P (d,d) Q None of them

Question

Which ordered pairs need to be added to the universal relationp = X^2on the set X = {a,b,c,d} to create the transitive closure p^t of p? A (a,a) B (a,b) C (a,c) D (a,d) E (b,a) F (b,b) G (b,c) H (b,d) I (c,a) J (c,b) K (c,c) L (c,d) M (d,a) N (d,b) O (d,c) P (d,d) Q None of them

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Solution

Para crear el cierre transitivo pt p^t de la relación p=X2 p = X^2 en el conjunto X={a,b,c,d} X = \{a, b, c, d\} , primero debemos entender qué significa el cierre transitivo. El cierre transitivo de una relación p p es la relación más pequeña que contiene a p p y es transitiva.

Dado que p=X2 p = X^2 , esto significa que p p contiene todos los pares ordenados posibles en X X . Es decir, p={(a,a),(a,b),(a,c),(a,d),(b,a),(b,b),(b,c),(b,d),(c,a),(c,b),(c,c),(c,d),(d,a),(d,b),(d,c),(d,d)} p = \{(a,a), (a,b), (a,c), (a,d), (b,a), (b,b), (b,c), (b,d), (c,a), (c,b), (c,c), (c,d), (d,a), (d,b), (d,c), (d,d)\} .

Para que p p sea transitiva, si (x,y)p(x, y) \in p y (y,z)p(y, z) \in p, entonces (x,z)p(x, z) \in p. Dado que p p ya contiene todos los pares posibles, ya es transitiva.

Por lo tanto, no es necesario agregar ningún par ordenado adicional para crear el cierre transitivo pt p^t de p p .

La respuesta correcta es:

Q. None of them

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