# ideal(RingElement) -- make an ideal

## Description

 i1 : ideal 7 o1 = ideal 7 o1 : Ideal of ZZ i2 : R = ZZ/2[x,y]; i3 : f = x^2+y^2; i4 : ideal f 2 2 o4 = ideal(x + y ) o4 : Ideal of R

The zero ideal with one generator can be made:

 i5 : ideal 0_R o5 = ideal 0 o5 : Ideal of R

Alternatively, the zero ideal with no generators can be made in one of these ways:

 i6 : ideal id_(R^0) o6 = ideal () o6 : Ideal of R i7 : promote(ideal(), R) o7 = ideal () o7 : Ideal of R

See promote, id _ Module, and ideal(Sequence).