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I Classification of First Order Linear Partial Differential Eq

  1. Jan 2, 2018 #1
  2. jcsd
  3. Jan 5, 2018 #2

    Simon Bridge

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    Not all linear first order PDEs are hyperbolic, no.
    The Quora post you point to actually spells that out... the author says that some are elliptical etc.

    You classify a PDE according to the definitions of the classes... for that detail, you need a good reference on PDEs.

    Turns out to be an easy Google (use, "classifying PDEs") to get for instance:
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