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Discrete mathematical design
R(R)= R∪I = { & lt; 1, 1 & gt; ,& lt 1,2 & gt; ,& lt2,2 & gt; ,& lt2,3 >,& lt3, 1 & gt; ,& lt3,3 & gt; }, where I is an identity relation.

S(R)=R∪R inverse = {

t(r)=r∪r^2∪r^3={<; 1, 1 & gt; ,& lt 1,2 & gt; ,& lt 1,3 & gt; ,& lt2, 1 & gt; ,& lt2,2 & gt; ,& lt2,3 >,& lt3, 1 & gt; ,& lt3,2 >,& lt3,3 & gt; }。