A second criterion employed for an assembly reaching a composome is its attaining a similarity between the composition vector and the flux vector of RQ≥0.9. This criterion is based on the notion that the momentary flux vector is an increment to the momentary composition vector. The rational is that in general, if a vector R is modified by a collinear incremental change dR, the direction of the incremented vector remains unchanged. This means that if the cosine similarity between the composition vector and an incrementing flux vector is collinear (RQ=1.0), then the assembly undergoes perfect homeostatic growth, underlying reproduction.