# Re: Determining the inverse function operation from a function definition

## glen herrmannsfeldt <gah@ugcs.caltech.edu>

30 Apr 2005 10:57:30 -0400

*From comp.compilers*

| List of all articles for this month |

**From: ** | glen herrmannsfeldt <gah@ugcs.caltech.edu> |

**Newsgroups: ** | comp.compilers |

**Date: ** | 30 Apr 2005 10:57:30 -0400 |

**Organization: ** | Compilers Central |

**References: ** | 05-04-067 05-04-092 |

**Keywords: ** | theory |

**Posted-Date: ** | 30 Apr 2005 10:57:30 EDT |

Dr. Diettrich wrote:

(snip)

*> Things will become a bit more complicated with exponentiation, sine,*

*> or other non-linear functions, which may require more complex*

*> transformations.*

Well, there are log() and arcsin() for those cases...

*> IMO you better ask your questions in a math group. Even if your problem*

*> is related to "symbol manipulation" or "transformation", it's not a*

*> matter of compilers nor grammars.*

There are two questions. One how to actually do the transformation,

and that should belong to a different group. Mathematica being one of

the more popular symbolic math programs, you might look at that.

The problem of parsing mathematical expressions is still there, and

should still be appropriate here. As one example, operator precedence

still exists in symbolic math.

-- glen

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