Implement the function log10

[TimothyClemans]

"very useful for those who use a lot logarithmic scale" - Ronan Paixão

[mabshoff]

Why this ticket? We already have

sage: log_b?
Type:		function
Base Class:	<type 'function'>
String Form:	<function log at 0x29b33f0>
Namespace:	Interactive
File:		/Users/michaelabshoff/Desktop/sage-3.1.3.rc0/local/lib/python2.5/site-packages/sage/misc/functional.py
Definition:	log_b(x, b=None)
Docstring:
    
        Return the log of x to the base b.  The default base is e.
    
        INPUT:
            x -- number
            b -- base (default: None, which means natural log)
            
        OUTPUT:
            number
    
        NOTE: In Magma, the order of arguments is reversed from in
        SAGE, i.e., the base is given first.  We use the opposite
        ordering, so the base can be viewed as an optional second
        argument.

One could obviously implement log10, but why pollute the global namespace even more?

Cheers,

Michael

[was]

Pari, Maple, and Mathematica all don't do this. We should not do this in Sage either. It is trivial to implement in terms of existing functions.