Implementation in torchphysics

[DKreuter]

https://github.com/boschresearch/torchphysics/tree/main/examples/deeponet

Some other implementations:

• https://github.com/NVIDIA/modulus
• https://github.com/lululxvi/deepxde

[DKreuter]

• final task: Implementation of a DeepONet structure in torchphysics

1. Test
2. Documentation
3. Notebook for Duffing example

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