log10, was: bug report, or am I doing something wrong?
Subject: log10, was: bug report, or am I doing something wrong?
From: Richard Fateman
Date: Wed, 15 Feb 2006 07:44:18 -0800
I think that log10 is typically used in a few areas e.g. decibel units
for noise, where a logarithmic scale seems to make sense.
Its most common educational use is in helping students do
multiplication of numbers by adding their logs, and in the
use of a slide rule. Either of these seems to me to be
a plausible "application" of computer algebra as an
educational lesson, but one that could be removed, as
training wheels on a bicycle, when one graduates from
this lesson. Oh, in such a lesson one would never ever
encounter natural log, since the exponential function
and anything to do with it is YEARS in the future.
So you would never have log10(x)/log(x) ever in such a lesson.
Similarly, unless you were a sound engineer, (or ??) you would
have no need to use log10.
So the world contexts may be pretty much separate. Someone
who wants log10 could add a rule to rewrite log(x) into log10.
Sure it would break integration, differentiation, etc. But that's
of no concern.
Just a thought.