four-group

four-group

[′fȯr ‚grüp]
(mathematics)
The only group of order 4 other than the cyclic group.
References in periodicals archive ?
For instance, the total area of dots in each group and the total length of the borders around each group's dots was the same in the two-group and four-group conditions.
Maintaining the general structure of the RUG III system, the proposed refinement adds 14 new RUG groups (for a total of 58) as well as a four-group medical ancillary index (MAI) to better account for the wide variation in non-therapy ancillary costs across RUG groups.