Kill Group of Euler Operators:
The Kill group only performs the opposite of what the Make group does. Actually, replacing the M and K in all Make operators with K and M, respectively, would get the operators of the Kill group. Thus, the Kill group consists of the following five operators:
With these operators, one may start with a tetrahedron and decrease it to nothing. As these operators are the opposites of the Make operators, we will not go further here.