Current location - Training Enrollment Network - Mathematics courses - What does discrete mathematics Ix mean?
What does discrete mathematics Ix mean?
R(R)= R∪Ix = { & lt; a,a & gt,& ltb,b & gt,& ltc,c & gt,& lta,b & gt,& ltb,c & gt,& ltc,a & gt}

S(R)=R ∪ R (inverse) = {

S(R)=R( 1 order) ∪ r (order 2) ∪ r (order 3) ... = {< a, b>,<b, a>,<b, c>},<c, b>.

R( 1 order) = r = {

R (second order) = {

R (third order) = {

R (fourth order) = {

Therefore: s (r) = {

Some symbols have been replaced by Chinese because they are difficult to input. .