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. 2017 Jun 27;79(7):1449–1486. doi: 10.1007/s11538-017-0277-2

Fig. 4.

Fig. 4

Schematic depiction of proper versus improper lumping. I Proper lumping: each of the original species (the left column) corresponds to, at most, one of the lumped states (the right column). II Improper lumping: each of the original states can correspond to one or more of the lumped states