1 | initial version |

Here is a stupid method::

```
var('x,y')
f(x) = log(x)
g(x) = solve(x == f(y), y)[0].rhs()
print g
```

Here is a compilation from several scattered sources:

- Sage can compute the inverse of a power series. See:
- link:Reference Manual
- link:sage-support discussion
- link:trac #7644 (closed)

- Somebody once asked for the derivative of the inverse of a general symbolic function, but nobody could figure out how to find just the inverse:
- Mathematica has what you are looking for:
- link:InverseFunction

2 | fixed spelling |

Here is a stupid ~~method::~~method:

```
var('x,y')
f(x) = log(x)
g(x) = solve(x == f(y), y)[0].rhs()
print g
```

Here is a compilation from several scattered sources:

- Sage can compute the inverse of a power series. See:
- link:Reference Manual
- link:sage-support discussion
- link:trac #7644 (closed)

- Somebody once asked for the derivative of the inverse of a general symbolic function, but nobody could figure out how to find just the inverse:
- Mathematica has what you are looking for:
- link:InverseFunction

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