> | ## 4.15 number Numbers are elements from the coefficient ring (or ground ring). They can only be defined or accessed with respect to a basering which determines the coefficient field. See ring declarations for declarations of coefficient fields. Warning: Beware of the special meaning of the letter `e` (immediately following a sequence of digits) if the field is real (or complex), Miscellaneous oddities.
> 4.15.1 number declarations |  |
> 4.15.2 number expressions |  |
> 4.15.3 number operations |  |
> 4.15.4 number related functions |  |

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