Singular Manual: ideal

> | ## 4.4 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.
> 4.4.1 ideal declarations |  |
> 4.4.2 ideal expressions |  |
> 4.4.3 ideal operations |  |
> 4.4.4 ideal related functions |  |

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