need help understanding pytorch blitz math notation
I just came across this notation in the pytorch blitz tutorial and I dont know what the vertical line is 



Does anyone have any suggestions on the notation?

The vertical line means the value of the left side variable given that the right side variable is a particular value. So, your given example means z_i is 27 when x_i is 1.

Basically, it means 'LHS holds given RHS'
