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MathGroup Archive 2004

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Re: 5 variables Guass isnt working, matrix solution

  • To: mathgroup at smc.vnet.net
  • Subject: [mg50469] Re: [mg50456] 5 variables Guass isnt working, matrix solution
  • From: DrBob <drbob at bigfoot.com>
  • Date: Sun, 5 Sep 2004 03:53:45 -0400 (EDT)
  • References: <159.3e690509.2e6b3260@aol.com>
  • Reply-to: drbob at bigfoot.com
  • Sender: owner-wri-mathgroup at wolfram.com

As you can see, I hope, I didn't get anything in the denominator. Mathematica's Solve function did.

Bobby

On Sat, 4 Sep 2004 10:59:44 EDT, <Rvald at aol.com> wrote:

> Dear Dr. Bob,
>
> How did you get 46 in the denominator?
>
> Roger V.
>
>
> In a message dated 9/4/2004 3:53:47 AM Central Standard Time,
> drbob at bigfoot.com writes:
> 5a - c - d - e == 0.5,
>      4b - c - e == 1,
>      6c - a - b - d - e == 1,
>      4d - a - c == 1,
>      5e - a - b - c == 1.5} // Solve
>
> {{a -> 0.413043, c -> 0.5, d -> 0.478261, b -> 0.521739, e -> 0.586957}}
>
> or
>
> {5a - c - d - e == 1/2,
>      4b - c - e == 1,
>      6c - a - b - d - e == 1,
>      4d - a - c == 1,
>      5e - a - b - c == 3/2} // Solve
>
> {{a -> 19/46, c -> 1/2,
>     d -> 11/23, e -> 27/46,
>     b -> 12/23}}
>
> Bobby
>
> On Sat, 4 Sep 2004 01:43:44 -0400 (EDT), roger <roger at banditorange.com> wrote:
>
>> 5a-c-d-e  =0.5
>> 4b-c-e    =1
>> 6c-a-b-d-e=1
>> 4d-a-c    =1
>> 5e-a-b-c  =1.5
>>
>> Solve for a,b,c,d, and e.   Guass inversion isnt working.
>>
>> Maybe a matrix solution.
>>
>>
>>
>
>
>



-- 
DrBob at bigfoot.com
www.eclecticdreams.net


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