TY  - RPRT
TI  - Algebraic multigrid preconditioning of the Hessian in optimization constrained by a partial differential equation
AU  - Barker, Andrew T.
AU  - Drăgănescu, Andrei
PY  - 2020
DO  - 10.1002/nla.2333
UR  - https://www.osti.gov/biblio/1786516
ID  - 1786516
ER  -