TY  - RPRT
TI  - KKT Preconditioners for PDE-Constrained Optimization with the Helmholtz Equation
AU  - Kouri, Drew P.
AU  - Ridzal, Denis
AU  - Tuminaro, Ray
PY  - 2021
DO  - 10.1137/20m1349199
UR  - https://www.osti.gov/biblio/1784959
ID  - 1784959
ER  -