Singular

4.9 list

Lists are arrays whose elements can be of different types (including ring). If one element belongs to a ring the whole list belongs to that ring. This applies also to the special list #. The expression list() is the empty list.

Note that a list stores the objects itself and not the names. Hence, if L is a list, L[1] for example has no name. A name, say R, can be created for L[1] by def R=L[1];. To store also the name of an object, say r, it can be added to the list with nameof(r);. Rings may be objects of a list.

Note: Unlike other assignments a ring as an element of a list is not a copy but another reference to the same ring.

4.9.1 list declarations
4.9.2 list expressions
4.9.3 list operations
4.9.4 list related functions