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when toggle format what by license comment
Feb 2, 2015 at 16:58 comment added Bjørn Kjos-Hanssen Haven't seen that notation before but I guess it means $\mathbb P(X=\sigma)=\frac12 \mathbf 1_{\{(12)\}}(\sigma)+\frac12 \mathbf 1_{\{(3,4)\}}(\sigma)$.
Feb 2, 2015 at 16:48 history answered Douglas Zare CC BY-SA 3.0