Unless I'm reading it wrong, which is entirely possible:
Second paragraph on the page, just after the S vector matrix - "The last value of the sorted S vector is greater than the threshold . . . "
I think it should be "The last value of the sorted S vector is less than the threshold . . . "
And the fourth paragraph, directly after the second S vector matrix - "Because p3 is estimated at its upper boundary of 1, a third value . . ."
I think it should be ""Because p3 is estimated at its upper boundary of 1, a second value . . ."
Just checking.