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From: Manuel Collado <m.collado@domain.invalid>
Newsgroups: comp.lang.ada
Subject: Re: My Invention of "Bug Sort".
Date: Thu, 21 Jun 2012 09:23:12 +0200
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Date: 2012-06-21T09:23:12+02:00
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El 21/06/2012 7:13, Simon Wright escribi�:
> "Jeffrey R. Carter"<ggsub@pragmada.co.cc>  writes:
>
>>> 2 ) In "O(N log N)" do I assume log to the base 'e' or what.
>>
>> In "Big-O" notation, log is understood to be to the base 2.
>
> Isn't there a constant factor between log2(x) and ln(x)? Which is taken
> up in the O?
>
>     N = e**x = 2**y
>
> Taking natural logs,
>
>     ln N = x = y.ln 2

Yes. In "Big-O" notation, the base for log() is irrelevant.

   O(log N) = O(ln N)

Both expressions denote exactly the same set of functions.

-- 
Manuel Collado - http://lml.ls.fi.upm.es/~mcollado