|This article is about a function from ApCoCoA-1.|
Computes a list of next-door neighbors.
This command computes the list of next-door neighbors in the border of the order ideal OO. The input is a list OO of terms that specify an order ideal. The output is a list of triples [i,j,k] such that b_i = x_k * b_j where the border terms b_i and b_j correspond to the i-th and j-th element of the list returned by the command BB.Border(OO).
@param OO A list of terms representing an order ideal.
@return A list of next-door neighbors of OO.
Use QQ[x,y,z]; BB.Border([1,x]); BB.NDneighbors([1,x]); [z, y, xz, xy, x^2] ------------------------------- [[3, 1, 1], [4, 2, 1]] -- E.g. the first triple of the result can be interpreted -- as x*z = xz