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*View this file with results and syntax highlighting [here](https://mlochbaum.github.io/BQN/help/undo.html).*

# Superscript Equals Sign (`⁼`)

## `𝔽⁼ 𝕩`, `𝕨 𝔽⁼ 𝕩`: Undo
[→full documentation](../doc/undo.md)

Invert the function `𝔽`, or use its defined inverse. Not all functions have inverses.


        1 - 2

        1 -⁼ 2

        √ 16

        √⁼ 4

        ⋆ 1

        ⋆⁼ 2.718281828459045