Optimization, Algorithms, Python, Linear Programming, Operations Research.
Rⁿ for which there exists an m-element set S ⊆ {1, 2, . . . , n} such that 1. The (square) matrix Aₛ is nonsingular, i.e., the columns indexed by B are linearly independent. 2. xⱼ=0 for all J ∉ S. If such a S is fixed, we call the variables xⱼ with j ∈ S the basic variables, while the remaining