MathGroup Archive 2010

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

Search the Archive

Re: Simplification question


It might be that Mathematica is having troubles because of the branch
cuts in the inverse functions.
If you take Tanh of both sides, then it becomes easier...

On Jun 15, 4:30 pm, Yaroslav Bulatov <yarosla... at gmail.com> wrote:
> I'd like to verify that the following expression is true for a,b real.
> It seems to hold numerically.
>
> 1/2 Log[(Exp[a + b] + Exp[-a - b])/(Exp[-a + b] + Exp[a - b])] ==
> ArcTanh[Tanh[a] Tanh[b]]
>
> I tried Reduce and combinations of TrigToExp/Simplify with no luck,
> any suggestions?



  • Prev by Date: Re: Simplification question
  • Next by Date: Re: How to construct symmetric matrix from just a one half matrix
  • Previous by thread: Re: Simplification question
  • Next by thread: Re: Simplification question