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*View this file with results and syntax highlighting [here](https://mlochbaum.github.io/BQN/help/undo.html).*
# Superscript Equals Sign (`⁼`)
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## `𝔽⁼ 𝕩`, `𝕨 𝔽⁼ 𝕩`: Undo
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Invert the function `𝔽`, or use its defined inverse. Not all functions have inverses.
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⋆⁼ 2.718281828459045
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