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I need to solve a PDE inside a region confined between two waves (as in the figure below). The waves amplitude and period do not matter at the present point (they can be arbitrary) I just need an efficient way to describe such a region via the ParametricRegion command.

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    $\begingroup$ Post your code. $\endgroup$
    – cvgmt
    Commented May 30, 2021 at 4:59

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How about

ParametricRegion[{x, y Cos[π x]}, {{x, -1, 1}, {y, -1, 1}}]
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  • $\begingroup$ Great, clear and right to the point I needed, thank!! $\endgroup$
    – dasV
    Commented May 30, 2021 at 21:59

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