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language agnostic - What's the term for "double recursion"?

Here's an obviously recursive function:

function()
{
    function();
}

We would simply call this "recursive"—but what about this (barely) more complex version?

functionLeft()
{
    functionRight();
}

functionRight()
{
    functionLeft();
}

Is there a term for this scenario, e.g., "double recursion"? Or is there no specific term to distinguish this case from the single-function case above?

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It's called mutual recursion.


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