Reaction Network Stoichiometry Matrix
Null space = conserved moieties · Flux balance analysis
Stoichiometry Matrix N (species × reactions)
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Null space dim: —
Stoichiometry matrix N: rows = species, cols = reactions. Null space of N (right) = steady-state flux modes (conservation).
Left null space = conserved moieties. FBA maximizes objective cᵀv s.t. Nv=0, v≥0.