The following vertex shapes can appear in an interactive lattice:
circle
Subgroup is not normal in whole group.
diamond
Subgroup is normal in whole group.
rectangle
Subgroup has an index that is too big for automatic calculation of normality. So it is not yet known whether this group is normal.
Automatic calculation is controlled by the following variable:
GGLLimitForIsNormalCalc V
Only for subgroups with index smaller than this number an automatic
IsNormal
test is performed when the vertex is added to the sheet.
[Up] [Previous] [Next] [Index]
xgap manual