TY - RPRT TI - PETSc TSAdjoint: A Discrete Adjoint ODE Solver for First-Order and Second-Order Sensitivity Analysis AU - Zhang, Hong AU - Constantinescu, Emil M. AU - Smith, Barry F. PY - 2022 DO - 10.1137/21m140078x UR - https://www.osti.gov/biblio/1885149 ID - 1885149 ER -