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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: [mg50466] Re: [mg50456] 5 variables Guass isnt working, matrix solution
  • From: Bob Hanlon <hanlonr at cox.net>
  • Date: Sun, 5 Sep 2004 03:53:41 -0400 (EDT)
  • Reply-to: hanlonr at cox.net
  • Sender: owner-wri-mathgroup at wolfram.com

eqns={
      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};

soln = Solve[eqns, {a,b,c,d,e}]//Flatten

{a -> 19/46, b -> 12/23, c -> 1/2, d -> 11/23, e -> 27/46}

And @@ (eqns /. soln)

True


Bob Hanlon

> 
> From: roger at banditorange.com (roger)
To: mathgroup at smc.vnet.net
> Date: 2004/09/04 Sat AM 01:43:44 EDT
> To: mathgroup at smc.vnet.net
> Subject: [mg50466] [mg50456] 5 variables Guass isnt working, matrix solution
> 
> 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.
> 
> 

Bob Hanlon
Chantilly, VA


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