When Math Gets Impossibly Hard

Re:When Math Gets Impossibly Hard by enriquto on Wednesday September 16, 2020 @03:24PM (#24496482)

This is analog computing, and it is really cool. Yet, I guess if it corresponds to a circuit it should be more an ODE than a PDE (unless your "circuit" involves large pieces of surface of non-uniform resistivity).

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Re:When Math Gets Impossibly Hard by 3pt14159 on Wednesday September 16, 2020 @03:34PM (#24496620)

It was a true PDE, not an ODE. The circuit was non-trivial, but though I knew PDEs at the time he told the story, I'd never used them on electronics (only heat / pressure flow, and other physical engineering stuff) so I couldn't really understand what he was saying.

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Re:When Math Gets Impossibly Hard by jonah-archive on Wednesday September 16, 2020 @04:33PM (#24497474)

You can definitely do this! Check out Karplus's "Analog Simulation" for examples with conductive fluids and resistance networks: https://archive.org/details/analogsimulation0000karp

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