- #1
FatTail
- 2
- 0
hi
if P and Q are 2 permutations of X, their product, P.Q, is the permutation of X (X=1,2,3,4,5), obtained by following the mapping Q with the mapping P. if Q=2 3 4 1 5, and P is 1 2 5 3 4, then how do i find P.Q and Q.P ?
i have tried a few mappings but can never get the same answer as in the book :)
answer for P.Q is 2 5 3 1 4
answer for Q.P is 2 3 5 4 1
please can anyone explain the steps.
thanks
if P and Q are 2 permutations of X, their product, P.Q, is the permutation of X (X=1,2,3,4,5), obtained by following the mapping Q with the mapping P. if Q=2 3 4 1 5, and P is 1 2 5 3 4, then how do i find P.Q and Q.P ?
i have tried a few mappings but can never get the same answer as in the book :)
answer for P.Q is 2 5 3 1 4
answer for Q.P is 2 3 5 4 1
please can anyone explain the steps.
thanks