Hello Hugo,
> Is it possible that there isn't a log10 function in maxima?
> Do I have to define such a function myself?
log10 is defined in a add-on package which isn't distributed with
Maxima releases before 5.9.3; you can download the file here:
http://cvs.sourceforge.net/viewcvs.py/maxima/maxima/share/contrib/log10.mac
You want the link that says "(download)".
Take a look at the comment header to verify that this function
does what you expect. Load the file into Maxima with
load("/foo/bar/log10.mac"); where /foo/bar is whereever you put it.
> P.S.Is there a search engine available for searching questions
> which have been previously posted in this group?
See http://maxima.sf.net/maximalist.html .
HTH
Robert Dodier