Glossary

ROC

Receiver Operating Characteristic; plots TPR vs. FPR as threshold varies.

ROC hull

The convex hull of achievable ROC points; mixing thresholds (and randomized classifiers) realizes any point on the hull.

TPR / FNR

True positive rate / false negative rate; FNR = 1 - TPR.

FPR / TNR

False positive rate / true negative rate; TNR = 1 - FPR.

PPR

Positive prediction rate; fraction of predictions that are positive.

Tolerance

Maximum allowed disparity under a chosen fairness constraint.