A system of linear equations is overdetermined if the number of equations is larger than the number of unknowns. If the number of equations is smaller than the number of unknowns, the system is underdetermined. In a system of linear equations representing a metabolic model, the equations are the metabolite balances and the unknowns are the metabolic fluxes through the intracellular reactions.
- Stephanopoulos G, Aristidou A, Nielsen J (1998) Metabolic Engineering: Principles and Methodologies. Academic Press, San Diego, ISBN: 978-0-12-666260-3, Chapter 8.Google Scholar