I guess
$ A \stackrel{\mathcal L}{=} B $
means $A$ and $B$ hand side has the same probability distribution. Is that right?
I guess
$ A \stackrel{\mathcal L}{=} B $
means $A$ and $B$ hand side has the same probability distribution. Is that right?
Correct. $A$ and $B$ are "equal in law" (thus the letter L), that is $A$ and $B$ have the same distribution.