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| iamkennyk |
 Posted: Sat May 03, 2008 7:42 pm Post subject: Ti-83 Calculator... Matrices with polynomial coefficients..? |
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Forum Freshman
Joined: 23 Apr 2008
Posts: 5
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Is there a program for the ti-83 that can solve systems of equations with polynomial coefficients? Or anyway to create and manipulate matrices that contain polynomial coefficients?
I am using Cramer's rule to solve systems of differential equations in Laplace space. So, almost all of the coefficients contain an unknown complex number 's'. With 3 or more equations, this becomes rather cumbersome to do by hand.
Yes, this can easily be done in Mathematica or Matlab, but I can only use a Ti-83. |
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| Chemboy |
| Posted: Sun May 04, 2008 7:26 pm Post subject: |
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Forum Ph.D.
Joined: 01 Jul 2006
Posts: 959
Location: NY
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To my knowledge the TI-83 isn't able to do anything like that, at least not with its standard features.
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"There is a kind of lazy pleasure in useless and out-of-the-way erudition." -Jorge Luis Borges |
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| Chemboy |
| Posted: Sun May 04, 2008 7:27 pm Post subject: |
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Forum Ph.D.
Joined: 01 Jul 2006
Posts: 959
Location: NY
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Whoa, sorry about that, my computer was acting weird.
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"There is a kind of lazy pleasure in useless and out-of-the-way erudition." -Jorge Luis Borges
Last edited by Chemboy on Mon May 05, 2008 2:19 pm; edited 1 time in total |
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| Chemboy |
| Posted: Sun May 04, 2008 7:28 pm Post subject: |
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Forum Ph.D.
Joined: 01 Jul 2006
Posts: 959
Location: NY
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ditto. Mods, delete these last two if you get a chance...
_________________
"There is a kind of lazy pleasure in useless and out-of-the-way erudition." -Jorge Luis Borges
Last edited by Chemboy on Mon May 05, 2008 2:20 pm; edited 1 time in total |
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| serpicojr |
| Posted: Sun May 04, 2008 8:28 pm Post subject: |
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Forum Ph.D.
Joined: 17 Jul 2007
Posts: 871
Location: JRZ
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| You can definitely do this, but it would involve some programming. Hopefully you can upload stuff to your calculator from your computer--the code itself shouldn't be too hard, but typing it on your calculator would be a real pain. You can represent matrices as strings of numbers. Addition is easy, multiplication only slightly harder. The hardest thing would be the division algorithm, i.e. something that does polynomial long division for you. You'd also likely need the Euclidean algorithm, but this is just a hop, skip and a jump away from the division algorithm. I bet you can find the relevant code somewhere on the net. |
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| iamkennyk |
| Posted: Wed May 07, 2008 10:02 pm Post subject: |
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Forum Freshman
Joined: 23 Apr 2008
Posts: 5
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| Yea I was thinking I could easily write a program to perform this.. but like you said, I will Not be typing into my Ti-83. I guess I'll just stick to doing them the fun way |
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