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D.15.13.9 isGroup
Procedure from library multigrading.lib (see multigrading_lib).
- Usage:
- isGroup(G); G a list
- Purpose:
- checks whether G is a valid group
- Note:
- G should be created by createGroup
(or createQuotientGroup, createTorsionFreeGroup)
- Return:
- int, 1 if G is a valid group and 0 otherwise
Example:
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