# Denis Ridzal

Principal Member of Technical Staff

## Principal Member of Technical Staff

(505) 845-1395

Sandia National Laboratories, New Mexico

P.O. Box 5800

Albuquerque, NM 87185-MS 1320

#### Research

Computational and applied mathematics, numerical analysis, numerical optimization, partial differential equations (PDEs), scientific software development, high-performance computing (HPC), applications in physical science and engineering.

- Numerical optimization:

Large-scale nonlinear programming; PDE-constrained optimization; stochastic optimization; matrix-free optimization; sequential quadratic programming (SQP); solvers and preconditioners for optimality systems. - Numerical analysis and PDEs:

Advanced compatible and high-order discretizations; finite element analysis; optimization-based property-preserving methods for hyperbolic problems. - Scientific software development and HPC:

Performance-portable and scalable implementations of numerical optimization algorithms through modern C++ programming; low-memory parallel computing through data compression; mixed-precision architectures for numerical optimization; extreme-scale PDE-constrained optimization. - Applications:

Optimal control, optimal design and inverse problems for solid mechanics, fluid dynamics, electromagnetics, semiconductor physics, electrical circuits, geophysics; additive manufacturing, shape optimization, topology optimization; sensing and image processing; trajectory optimization; analog computing; computational mesh optimization.