Gradient boosting

Gradient-boosted decision trees: classification, regression and ranking losses.

GradientBoosting	Gradient-boosted decision trees with CatBoost's GPU learner as the reference.
GradientBoostingClassifier	Binary gradient-boosted tree classifier with a scikit-learn interface.
GradientBoostingRegressor	Gradient-boosted tree regressor with a scikit-learn interface.