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Re: Simplify Log[ab] - Log[b] to Log[a] ?


In a message dated 2/21/99 8:52:18 AM, simon at allfrey13.freeserve.co.uk writes:

>How do I persuade Mathematica to simplify
>
>Log[a b] - Log[b] to Log[a]?
>
>when processing algebraic expressions?
>

Log[a*b] - Log[b] /. Log[x_*y_] -> Log[x] + Log[y]

or

Log[a*b] - Log[b] /. Log[x_]- Log[y_] -> Log[x/y]

or

Log[a*b] - Log[b] // PowerExpand



Bob Hanlon


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