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Author SHA1 Message Date
Philip Hyunsu Cho
5fc5ec539d
Implement robust regularization in 'survival:aft' objective (#5473) 
* Robust regularization of AFT gradient and hessian

* Fix AFT doc; expose it to tutorial TOC

* Apply robust regularization to uncensored case too

* Revise unit test slightly

* Fix lint

* Update test_survival.py

* Use GradientPairPrecise

* Remove unused variables
 2020-04-04 12:21:24 -07:00