MathGroup Archive 2006

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Help with Identities

  • To: mathgroup at
  • Subject: [mg65585] Help with Identities
  • From: "Sven C. Koehler" <schween at>
  • Date: Sun, 9 Apr 2006 04:32:10 -0400 (EDT)
  • Sender: owner-wri-mathgroup at


As an occasional mathematican, I sometimes forget that i.e.

Log[x/y] is very similar to Log[x] / Log[y]

Is there some way in Mathematica to see how an mathematical
expression could look like alternatively?  (Something like the  opposite
of Simplify.)

And then I wonder why 

Log[x/y] === Log[x] - Log[y]

is False.  Can I instruct Mathematica to explain why this is False?

Best wishes,


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