# Remove constant term

p=5 K.=GF(p^2);K.modulus() R.<z>=PolynomialRing(K); f=(2*a+4).

from above equation i just want to remove constant term 4

Remove constant term

p=5 K.=GF(p^2);K.modulus() R.<z>=PolynomialRing(K); f=(2*a+4).

from above equation i just want to remove constant term 4

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Asked: ** 2016-04-15 12:51:21 +0200 **

Seen: **260 times**

Last updated: **Apr 15 '16**

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[EDIT]I misunderstood your question, and you get an answer on your other question.[/EDIT]Your question does not make sense to me: You define`K`

as the finite field with 25 elements, and`R`

as the polynomial ring in`z`

over`K`

. Then, you define`f`

which has nothing to do with`R`

or`K`

since it is a symbolic expression depending on a variable`a`

! Actually, the code as you write it does not even work since`a`

is undeclared. But let's say it is declared somewhere as a symbolic variable. You can either write simply`f-4`

to get no constant coefficient, or`f-f(a=0)`

. If`f`

where a polynomial of the polynomial ring`R`

(say`f=2*z+4`

), you could also do`f - f.constant_coefficient()`

.