Gauss-Seidel: I can't get diagonally dominant equations












1












$begingroup$


I've got the question:



Use the Gauss-Seidel method to solve:



$8x_1 - 16x_2 = 6$



$4x_1 + 8x_2 = 0$



I know that the equations have to be diagonally dominant, but I can't see how to determine this. I would change the system above to be diagonally dominant.



No matter which way round I have the equations, I just seem to be in an endless loop, so no divergence; but I don't get two results in a row to assume an answer.



Any ideas/hints would be greatly appreciated.










share|cite|improve this question











$endgroup$












  • $begingroup$
    Add the second equation to the first?
    $endgroup$
    – I like Serena
    Jan 17 at 1:06
















1












$begingroup$


I've got the question:



Use the Gauss-Seidel method to solve:



$8x_1 - 16x_2 = 6$



$4x_1 + 8x_2 = 0$



I know that the equations have to be diagonally dominant, but I can't see how to determine this. I would change the system above to be diagonally dominant.



No matter which way round I have the equations, I just seem to be in an endless loop, so no divergence; but I don't get two results in a row to assume an answer.



Any ideas/hints would be greatly appreciated.










share|cite|improve this question











$endgroup$












  • $begingroup$
    Add the second equation to the first?
    $endgroup$
    – I like Serena
    Jan 17 at 1:06














1












1








1


0



$begingroup$


I've got the question:



Use the Gauss-Seidel method to solve:



$8x_1 - 16x_2 = 6$



$4x_1 + 8x_2 = 0$



I know that the equations have to be diagonally dominant, but I can't see how to determine this. I would change the system above to be diagonally dominant.



No matter which way round I have the equations, I just seem to be in an endless loop, so no divergence; but I don't get two results in a row to assume an answer.



Any ideas/hints would be greatly appreciated.










share|cite|improve this question











$endgroup$




I've got the question:



Use the Gauss-Seidel method to solve:



$8x_1 - 16x_2 = 6$



$4x_1 + 8x_2 = 0$



I know that the equations have to be diagonally dominant, but I can't see how to determine this. I would change the system above to be diagonally dominant.



No matter which way round I have the equations, I just seem to be in an endless loop, so no divergence; but I don't get two results in a row to assume an answer.



Any ideas/hints would be greatly appreciated.







matrices algebra-precalculus






share|cite|improve this question















share|cite|improve this question













share|cite|improve this question




share|cite|improve this question








edited Jan 16 at 21:52









Andreas

8,1131037




8,1131037










asked Jan 16 at 21:38









Mitul SuchakMitul Suchak

65




65












  • $begingroup$
    Add the second equation to the first?
    $endgroup$
    – I like Serena
    Jan 17 at 1:06


















  • $begingroup$
    Add the second equation to the first?
    $endgroup$
    – I like Serena
    Jan 17 at 1:06
















$begingroup$
Add the second equation to the first?
$endgroup$
– I like Serena
Jan 17 at 1:06




$begingroup$
Add the second equation to the first?
$endgroup$
– I like Serena
Jan 17 at 1:06










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