TITLE: Is there a standard notation for the product from right to left?
QUESTION [5 upvotes]: I am considering a product of the matrices $(A_i)_{1\leq i\leq n}$ in reverse order 
$$P=A_nA_{n-1}\dots A_1,$$
and I was wondering if there was a standard notation for it, like $\overleftarrow{\prod}$ or $\prod^R$... Thanks

REPLY [2 votes]: I don't think there is such a notation.
However, you won't need it, as you can do the following product:
$$\prod_{i=1}^n A_{n-i+1}$$
or equivalently
$$\prod_{i=0}^{n-1} A_{n-i}$$