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MathGroup Archive 2001

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Re: combining Log[] terms

  • To: mathgroup at
  • Subject: [mg30494] Re: [mg30482] combining Log[] terms
  • From: BobHanlon at
  • Date: Fri, 24 Aug 2001 04:05:53 -0400 (EDT)
  • Sender: owner-wri-mathgroup at

In a message dated 2001/8/23 2:24:57 AM, nbock at writes:

>Is there a function that combines terms like
>Log[a] - Log[b]
>I couldn't find anything so far in the documentation regarding the
>Log[] function, only some references to Collect[], which does
>something similar to what I want for powers of a given expression.

Use a rule

Log[a] - Log[b];

% /. Log[y_] - Log[z_] -> Log[y/z]



Log[a] - Log[b]

Bob Hanlon
Chantilly, VA  USA

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