# CM2Residual -- Strategy for eliminationMatrix.

## Synopsis

• Usage:
eliminationMatrix(..., Strategy => CM2Residual)
• Consequences:
• Suppose given a homogeneous ideal locally complete intersection Cohen-Macaulay of codimension 2,
• $J=(g_1,..,g_n)$
• , such that
• $I=(f_1,..,f_m)$
• is included in J and (I:J) is a residual intersection. Let H be the matrix that I=J.H. Let R be the matrix of the first syzygies of J. This function computes an elimination matrix corresponding to the residual resultant over V(I) over V(J).

## For the programmer

The object CM2Residual is .