This is an example from the book.(adsbygoogle = window.adsbygoogle || []).push({});

For B = {1,2}, let A = P(B) = {empty, {1}, {2}, {1,2} }

The following is an example of relation on A:

R = {

(emp,emp),

(emp, {1})

(emp, {2}),

(emp, {1,2}) ,

({1},{1}),

({1}, {1,2}) ,

({2},{2}),

({2}, {1,2},

({1,2},{1,2}),

}

My question is, what happen to ({1}, emp), ({2}, {1}.. i see the trend that it is skipping everything before the current relation. Why?

Like A X B

let A = {1,2} and B = {2,3,4}

We will have 1,2 1,3 1,4 2,2, 2,3 2,4

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# Relation problem

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