Permutation multiplication in S3

Question

I have a question regarding multiplication in S3 with a=(2 3) and b=(1 2)

The video I watched was showing left and right cosets in this case being different with

ab=(1 3 2)

ba=(1 2 3)

I understand ba as (1 2)(2 3)= (1↦2↦3)

but im not sure of ab as (2 3)(1 2)= 2↦3 but after this im stuck and have no idea. Im trying to think how ( 1 3 2) is the result of this but I have no idea

$(12)(23)$ maps $1$ to $2$, $2$ to $3$, and $3$ to $2$ to $1$, so it's $(123)$ — J. W. Tanner, Apr 08 '21 at 03:43

score 0 · Accepted Answer · answered Apr 08 '21 at 03:59

0

$(23)(12)$ maps $1$ to $2$ to $3$, $3$ to $2$, and $2$ to $1$, so it's $(132)$.

answered Apr 08 '21 at 03:59

J. W. Tanner

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Permutation multiplication in S3

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