Re: [sage-support] log to the base 2

['Reimundo Heluani' via sage-support]

On Jul 18, Michael Beeson wrote:

sage: n(log(2,408/370))

7.08999206263157

sage: log(2,2)

1

sage: 2^7

128

sage: n(log(2,408.0/370))

7.08999206263157

sage: version()

'SageMath version 8.7, Release Date: 2019-03-23'

sage: n(log(2,1.001))

693.493696416899

sage:log(2,1)  gives an error instead of 0.

sage: log?
Signature:      log(*args, **kwds)

   second argument which if missing defaults to "e".

   It calls the "log" method of the first argument when computing the
   logarithm, thus allowing the use of logarithm on any object
   containing a "log" method. In other words, "log" works on more than
   just real numbers.


sage:
sage: log(1,2)
0



Also on my Sage 9.2.beta2

sage: log(2,1)
Infinity

Docstring: Return the logarithm of the first argument to the base of the So it should be Which works fine. Cheers, R.

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