prove why they have or do not have the properties: reflexive, symmetric, antisymmetric, transitive they have. Write which of these is an equivalence relation. 1) Set A = {a,b,c}, relation R:A x A is defined as R = {(a,a},(b,b),(c,c),(a,b),(a,c),(c,b)}

Advanced Engineering Mathematics
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Author:Erwin Kreyszig
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prove why they have or do not have the properties: reflexive, symmetric, antisymmetric, transitive they have. Write which of these is an equivalence relation.

1) Set A = {a,b,c}, relation R:A x A is defined as R = {(a,a},(b,b),(c,c),(a,b),(a,c),(c,b)} 

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Step 1

A=a,b,cR=a,a, b,b, c,c, a,b, a,c, c,b

A relation is reflexive if a,aR for every element a.

Here a,a,b,b,c,cR. Thus, R is reflexive.

A relation is symmetric if a,bR implies b,aR for every element a, b.

Here a,bR, but b,aR. Thus, R is not symmetric.

 

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