Abstract
We introduce physics informed neural networks -- neural networks that are
trained to solve supervised learning tasks while respecting any given law of
physics described by general nonlinear partial differential equations. In this
two part treatise, we present our developments in the context of solving two
main classes of problems: data-driven solution and data-driven discovery of
partial differential equations. Depending on the nature and arrangement of the
available data, we devise two distinct classes of algorithms, namely continuous
time and discrete time models. The resulting neural networks form a new class
of data-efficient universal function approximators that naturally encode any
underlying physical laws as prior information. In this first part, we
demonstrate how these networks can be used to infer solutions to partial
differential equations, and obtain physics-informed surrogate models that are
fully differentiable with respect to all input coordinates and free parameters.
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