## 4.6 ideal

Ideals are represented as lists of polynomials which generate the ideal. Like polynomials they can only be defined or accessed with respect to a basering.

Note: `size` counts only the non-zero generators of an ideal whereas `ncols` counts all generators; see size, ncols.

> 4.6.1 ideal declarations |  |
> 4.6.2 ideal expressions |  |
> 4.6.3 ideal operations |  |
> 4.6.4 ideal related functions |  |

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