# Reduction of order tecnique

• June 9th, 2009, 05:08 PM
doctor_cat
Reduction of order tecnique
Hi!

Is it possible to use Reduction of order technique (by d'Alembert) for solving systems of homogeneus n-order ( n>2) linear ODEs with variable coefficients?

Thank you!
• June 9th, 2009, 06:22 PM
doctor_cat
• June 9th, 2009, 06:54 PM
DrRocket
Re: Reduction of order tecnique
Quote:

Originally Posted by doctor_cat
Hi!

Is it possible to use Reduction of order technique (by d'Alembert) for solving systems of homogeneus n-order ( n>2) linear ODEs with variable coefficients?

Thank you!

Why do that ?

You can always view an n-th order ODE as a system of n first-orde ODEs and then solve the system of first-order ODE in a straightforward manner -- see the other thread that you started.
• June 10th, 2009, 04:45 AM
doctor_cat
Ok, you're right!

And is it possible to use Reduction of order technique for solving n-order ( n>2 ) systems of homogeneus linear ODEs with variable coefficients?
• June 10th, 2009, 12:33 PM
salsaonline
Quote:

Originally Posted by doctor_cat
Ok, you're right!

And is it possible to use Reduction of order technique for solving n-order ( n>2 ) systems of homogeneus linear ODEs with variable coefficients?

Instead of asking, why not try it out on some given system and see what happens.
• June 11th, 2009, 02:18 AM
DrRocket
Re: hi
Quote:

Originally Posted by cristiano
Hello friends.I'm cristiano from spain.Nice to meet you all.In my opinion,you can always view an n-th order ODE as a system of n first-orde ODEs and then solve the system of first-order ODE in a straightforward manner -- see the other thread that you started.Thank you.
___________________

You have now made three posts. In each one you have parroted the posts of someone else with no clear understanding of what you are parroting. Apparently you have no ability to think for yourself.

• June 11th, 2009, 10:38 AM
doctor_cat
Re: hi
Quote:

Originally Posted by DrRocket

You have now made three posts. In each one you have parroted the posts of someone else with no clear understanding of what you are parroting. Apparently you have no ability to think for yourself.

Are you accusing me or cristiano?
• June 11th, 2009, 10:43 AM
DrRocket
Re: hi
Quote:

Originally Posted by doctor_cat
Quote:

Originally Posted by DrRocket

You have now made three posts. In each one you have parroted the posts of someone else with no clear understanding of what you are parroting. Apparently you have no ability to think for yourself.

Are you accusing me or cristiano?

cristiano. That is why I quoted him.
• June 11th, 2009, 10:54 AM
Guitarist
Sorry, been a little lax of late, but who is "cristiano"? I can find no post with this authorship.

P.S. OK, forget it - admins took him/it out on suspicion of being a bot. (Note to self - must pay more attention here)
• June 11th, 2009, 06:24 PM
(In)Sanity
Cristiano has gone by by along with his 7 or 8 total posts. Spamertizments in his/her sig.
• June 12th, 2009, 12:17 AM
salsaonline
Quote:

Originally Posted by (In)Sanity
Cristiano has gone by by along with his 7 or 8 total posts. Spamertizments in his/her sig.

"Ray has gone bye bye, Egon."