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Re: log expression not simplified

  • To: mathgroup at smc.vnet.net
  • Subject: [mg115702] Re: log expression not simplified
  • From: Alexei Boulbitch <alexei.boulbitch at iee.lu>
  • Date: Wed, 19 Jan 2011 05:22:43 -0500 (EST)

Try this:

PowerExpand[Log[a/b]/Log[b/a],
   Assumptions ->  {a>  0, b>  a}] // Simplify


-1


Sorry, can anybody help me understand why

Simplify[Log[a/b]/Log[b/a], Assumptions ->  {a>  0, b>  a}]

doesn't reduce to -1 ??
Thanks (it's for a simple Carnot cycle calculation...)!

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