[Date Index] [Thread Index] [Author Index]

Re: Working with Log

• To: mathgroup at smc.vnet.net
• Subject: [mg112126] Re: Working with Log
• From: Peter <insomnia.berlin at gmail.com>
• Date: Tue, 31 Aug 2010 04:27:15 -0400 (EDT)
• References: <i5g0ku$grr$1@smc.vnet.net>

On 30 Aug., 12:20, Themis Matsoukas <tmatsou... at me.com> wrote:
> I can use PowerExapnd to expand a Log:
>
> PowerExpand[Log[a b]]
>
> Log[a] + Log[b]
>
> How can I do the opposite, i.e. combine Log[a] + Log[b] into Log[a b]?
>
> Thanks
>
> Themis

try:

In[1]:= FullSimplify[Log[a]+Log[b],a>0<b]
Out[1]= Log[a b]

Peter