Leveraging Multitime Hamilton–Jacobi PDEs for Certain Scientific Machine Learning Problems
- Brown University, Providence, RI (United States); Brown University
- University of California, Los Angeles, CA (United States)
- Brown University, Providence, RI (United States)
- Brown University, Providence, RI (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Hamilton-Jacobi partial differential equations (HJ PDEs) have deep connections with a wide range of fields, including optimal control, differential games, and imaging sciences. By considering the time variable to be a higher dimensional quantity, HJ PDEs can be extended to the multi-time case. In this paper, we establish a novel theoretical connection between specific optimization problems arising in machine learning and the multi-time Hopf formula, which corresponds to a representation of the solution to certain multi-time HJ PDEs. Through this connection, we increase the interpretability of the training process of certain machine learning applications by showing that when we solve these learning problems, we also solve a multi-time HJ PDE and, by extension, its corresponding optimal control problem. As a first exploration of this connection, we develop the relation between the regularized linear regression problem and the Linear Quadratic Regulator (LQR). We then leverage our theoretical connection to adapt standard LQR solvers (namely, those based on the Riccati ordinary differential equations) to design new training approaches for machine learning. Lastly, we provide some numerical examples that demonstrate the versatility and possible computational advantages of our Riccati-based approach in the context of continual learning, post-training calibration, transfer learning, and sparse dynamics identification.
- Research Organization:
- Brown University, Providence, RI (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); Multidisciplinary University Research Initiative (MURI); Air Force Office of Scientific Research (AFOSR)
- Grant/Contract Number:
- SC0023191
- OSTI ID:
- 2441157
- Journal Information:
- SIAM Journal on Scientific Computing, Journal Name: SIAM Journal on Scientific Computing Journal Issue: 2 Vol. 46; ISSN 1064-8275
- Publisher:
- Society for Industrial and Applied Mathematics (SIAM)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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