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Re: Problem with Syntax in Mathematica Summation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg84415] Re: Problem with Syntax in Mathematica Summation
  • From: Szabolcs Horvát <szhorvat at gmail.com>
  • Date: Sat, 22 Dec 2007 05:43:45 -0500 (EST)
  • References: <fkhq6b$2q4$1@smc.vnet.net>

Manuel Salazar wrote:
> I have a complex summation equation that I'm trying to simplify. However, I keep getting a number of error messages that I can't figure out.
> the formula is as follows:
> 
> wacc = ((rf +\[Beta] ((1 + tax) (d/(d + e))) (rf - rm)) (e/(d + 
>         e))) ((rf + (1 - (NormalPValue[(Log[(d/(d + e))]/((d/(d + 
>                   e)) - 1)) (1/stde)])) r) (d/(d + e)))
> value = \!\(
> UnderoverscriptBox[\(\(\ \)\(\[Sum]\)\), \(t = 1\), \(\[Infinity]\)] 
> \*FractionBox[\((ebitda \\_ t\ \((1 - tax)\))\), \(\((1 + wacc)\)^
>      t\)]\) + \!\(
> \*UnderoverscriptBox[\(\[Sum]\), \(t = 1\), \(\[Infinity]\)]
> \*FractionBox[\(\((dep \\_ t)\)\ tax\), \(\((1 + wacc)\)^
>      t\)]\) - \!\(
> \*UnderoverscriptBox[\(\[Sum]\), \(t = 1\), \(n\)]
> \*FractionBox[\(\((d \\_ 0 - 
> \*UnderoverscriptBox[\(\[Sum]\), \(t = 
>           1\), \(n\)]d \\_ \((t - 1)\))\) \((rf + 
>        1 - \((NormalPValue[\((
> \*FractionBox[\(Log[\((d/\((d + e)\))\)]\), \(\((d/\((d + e)\))\) - 
>              1\)])\) \((
> \*FractionBox[\(1\), \(stde\)])\)])\))\) 
>      r \((1 - tax)\)\), \(\((1 + wacc)\)^t\)]\) - \!\(
> \*UnderoverscriptBox[\(\[Sum]\), \(t = 1\), \(n\)]
> \*FractionBox[\(d \\_ 0/n\), \(\((1 + wacc)\)^t\)]\) - kinv \_ 0
> 
> and I get the following error messages:
> 
> Syntax::sntxb: Expression cannot begin with "[ebitda \_t](1-tax)".
> Syntax::sntxi: Incomplete expression; more input is needed.
> 
> I need help with this errors to be able to simplify this formula.
> 

Please post something human readable.  Convert the expression to input 
form using ctrl+shift+I before posting.  The expression in this message 
cannot be pasted to Mathematica to get a valid expression.

-- 
Szabolcs


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