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 setmod([p])

:: Sets the ground field to GF(p).
 return

integer
 n

prime less than 2^27

Sets the ground field to GF(p) and returns the value p.

A member of a finite field does not have any information
about the field and the arithmetic operations over GF(p) are applied
with p set at the time.

As for large finite fields, see section Finite fields.
[0] A=dp_mod(dp_ptod(2*x,[x]),3,[]);
(2)*<<1>>
[1] A+A;
addmi : invalid modulus
return to toplevel
[1] setmod(3);
3
[2] A+A;
(1)*<<1>>
 References

section
dp_mod
, dp_rat
, section Types of numbers.
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