Call polynomial ring variables by index

asked 2021-04-24 20:12:45 +0100

vet99
13 ●5

updated 2021-04-25 14:47:31 +0100

slelievre
17704 ●22 ●160 ●350 http://carva.org/samue...

In my study I have to work with something like BooleanPolynomialRing(... 'x', 10).

After that I can create function in the form x1 + x1*x3 + ....

However I would like to create functions in more generic form like x[1] + x[2]*x[3] where x[1] is equivalent for x1, etc.

The final goal is to be able to construct functions programmatically combining indexed expressions like x[i] + x[j] etc.

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answered 2021-04-25 02:16:38 +0100

John Palmieri

8876 ●19 ●73 ●192 http://www.math.washin...

Is this what you want?

sage: R = BooleanPolynomialRing(10, 'x')                                                  
sage: R                                                                                   
Boolean PolynomialRing in x0, x1, x2, x3, x4, x5, x6, x7, x8, x9
sage: x = R.gens()                                                                        
sage: x                                                                                   
(x0, x1, x2, x3, x4, x5, x6, x7, x8, x9)
sage: x[2]                                                                                
x2

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Thank you! Problem solved.

vet99 ( 2021-04-25 15:35:14 +0100 )edit

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Asked: 2021-04-24 20:11:27 +0100

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Last updated: Apr 25 '21

Call polynomial ring variables by index edit