Answer by FeedbackLooper for How would you call a function that doesn't have...
You can say that there is "no closed form" expression for it. If you know that the function is uniquely defined by some property or equation you cannot solve explicitly, e.g. if your $f(x)$ satisfy...
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What is the right name for a function that can't be described by a formula? I mean, I have $f(x) \to y$, but I can't explain how technically it gets the $y$.I'm thinking about non-describable, but I'm...
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