# Revision history [back]

### Get coefficients from polynomial in quotient ring

Let say I have the following quotient ring:

F.<t> = PolynomialRing(GF(2), 'x').quotient(x^128 + x^7 + x^2 + x + 1);


Then I create the polynomial, for example t^128 which yields:

t^7 + t^2 + t + 1


Now how do I obtain the array of coefficients of this polynomial? Or, similarly, how do I actually substitute 2 for t and evaluate this polynomial? The subs method doesn't work. (Probably the polynomial needs to be coerced to other ring with base field where 2 != 0).

### Get coefficients from polynomial in quotient ring

Let say I have the following quotient ring:

F.<t> = PolynomialRing(GF(2), 'x').quotient(x^128 + x^7 + x^2 + x + 1);


Then I create the a polynomial, for example t^128 which yields:

t^7 + t^2 + t + 1


Now how do I obtain the array of coefficients of this polynomial? Or, similarly, how do I actually substitute 2 for t and evaluate this polynomial? The subs method doesn't work. (Probably the polynomial needs to be coerced to other ring with base field where 2 != 0).

### Get coefficients from of a polynomial in quotient ring

Let say I have the following quotient ring:

F.<t> = PolynomialRing(GF(2), 'x').quotient(x^128 + x^7 + x^2 + x + 1);


Then I create a polynomial, for example t^128 which yields:

t^7 + t^2 + t + 1


Now how do I obtain the array of coefficients of this polynomial? Or, similarly, how do I actually substitute 2 for t and evaluate this polynomial? The subs method doesn't work. (Probably the polynomial needs to be coerced to other ring with base field where 2 != 0).

 4 No.4 Revision slelievre 9332 ●7 ●96 ●183 http://carva.org/samue...

### Get coefficients of a polynomial in quotient ring

Let say I have the following quotient ring:

F.<t> = PolynomialRing(GF(2), 'x').quotient(x^128 + x^7 + x^2 + x + 1);


Then I create a polynomial, for example t^128 which yields:

t^7 + t^2 + t + 1


Now how do I obtain the array of coefficients of this polynomial? Or, similarly, how do I actually substitute 2 for t and evaluate this polynomial? The subs method doesn't work. (Probably the polynomial needs to be coerced to other ring with base field where 2 != 0).