Partitioned preassigned pivot procedure. A procedure for arranging the basis matrix of a linear-programming problem into as near a lower triangular form as possible. Such an arrangement helps in maintaining a sparse inverse, given that the original data set for the associated linear-programming problem is sparse.
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(2013). P4. In: Gass, S.I., Fu, M.C. (eds) Encyclopedia of Operations Research and Management Science. Springer, Boston, MA. https://doi.org/10.1007/978-1-4419-1153-7_200569
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