Set v of ZG-generators for the submodule '

(-1+x)e_a

(-1+xyx)e_b+(-1+x-y+yx)e_c

(-1-y)e_a+(-1-x-x²-yx)e_b+(1+y+xy+yxy)_c

(1-y)e_a +(-x+y+xyx-x⁵+x⁴y-x²yxy)e_c

The main table

Summary

How to use the table?