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Re: FullSimplify fails for very large numbers and powers

  • To: mathgroup at smc.vnet.net
  • Subject: [mg89986] Re: [mg89880] FullSimplify fails for very large numbers and powers
  • From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
  • Date: Thu, 26 Jun 2008 04:38:54 -0400 (EDT)
  • References: <200806240719.DAA10525@smc.vnet.net>

Use Together.


Andrzej Kozlowski



On 24 Jun 2008, at 16:19, Paul Schneider wrote:

> Dear newsgroup,
>
> FullSimplify (Mathematica 6 and 5.2) does not simplify the expression:
>
> (-1505046085600344525396741688335403635402237542400000000000000000000000000
> *(-kth
> + 2*k*r)^187*(kth - 2*k*r + 6*s*(-2*k*rho + s))^6*
>   (kth - 2*k*r + 8*s*(-2*k*rho + s))^6*((k^196*(kth +
> s^2))/ 
> (3010092171200689050793483376670807270804475084800000000000000000000000000 
> *(-kth
> + 2*k*r)^187*
>      (kth - 2*k*r + 6*s*(-2*k*rho + s))^6*(kth - 2*k*r + 8*s*(-2*k*rho
> + s))^6) + (k^196*(4*k^2 - 4*k*rho*s + s^2))/
>
> (3010092171200689050793483376670807270804475084800000000000000000000000000 
> *(-kth
> + 2*k*r)^187*(kth - 2*k*r + 6*s*(-2*k*rho + s))^6*
>      (kth - 2*k*r + 8*s*(-2*k*rho + s))^6)))/k^199
>
> to the much nicer
>
> -(4*k^2 + kth - 4*k*rho*s + 2*s^2)/(2*k^3)
>
> Do you have tips on how I could achieve this?
>
> Thank you,
>
> Paul
>
> PS: the expressions are in InputForm. Somehow the power signs get lost
> when pasting from Thunderbird. Pasting from Kmail seems to work.
>



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