MathGroup Archive 1999

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Log manipulation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg16804] Log manipulation
  • From: Pierre infelta <pierre.infelta at epfl.ch>
  • Date: Tue, 30 Mar 1999 02:35:11 -0500
  • Organization: EPFL
  • Sender: owner-wri-mathgroup at wolfram.com

I am sure this is a classic but I don't seem to find the answer.

I am looking for the command that will do the opposite of powerExpand
for the Log function.

If I have 

PowerExpand[Log[a*b]]
I get 

Log[a] +Log[b]

Is there a command that does the opposite?

Command[Log[a] + Log[b]]

to get

Log[a b]

as an answer

Thanks


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