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solving equations and using values obtained in other calculations

asked 2014-10-22 06:50:28 -0500

wasyl gravatar image

updated 2014-10-22 10:34:01 -0500

Hi

The function solve() in SAGE returns symbolic values for the variables i solve the equations for e.g.:

sage: s=solve(eqn,y)
sage: s
[y == -1/2*(sqrt(-596*x^8 - 168*x^7 - 67*x^6 + 240*x^5 + 144*x^4 - 60*x - 4) + 8*x^4 + 11*x^3 + 12*x^2)/(15*x + 1),
 y == 1/2*(sqrt(-596*x^8 - 168*x^7 - 67*x^6 + 240*x^5 + 144*x^4 - 60*x - 4) - 8*x^4 - 11*x^3 - 12*x^2)/(15*x + 1)]

My problem is that i need to use the values obtained for y in other calculations, but I cannot assign these values to any other variable. Could someone please help me with this?

Thank You

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Comments

Did you intend to introduce some spam html code (advertising a Polish society) in your question ? Otherwise, it might be a virus... be careful.

vdelecroix gravatar imagevdelecroix ( 2014-10-22 07:16:26 -0500 )edit

No, sorry. It was a malware or something?

wasyl gravatar imagewasyl ( 2014-10-23 03:35:44 -0500 )edit

I have no idea where it came from but there was something. Hopefully, harmless.

vdelecroix gravatar imagevdelecroix ( 2014-10-23 05:57:27 -0500 )edit

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answered 2014-10-22 07:24:04 -0500

There is an option in the function solve that allows to do that. To access the documentation of a function, just do

sage: solve?<ENTER>

You might like the option solution_dict=True

You can also have a look at these other questions

Vincent

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Asked: 2014-10-22 06:50:28 -0500

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Last updated: Oct 22 '14