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Identifying parameter regions for multistationarity

Fig 4

Two examples describing a hybrid histidine kinase (row 1) and a gene transcription network (row 2).

Column 1: the reaction network; Column 2: the function where monomials with coefficients of constant sign (−1)^s are in blue, and those that can have sign (−1)^s+1 are in red; Column 3: parameter conditions for multistationarity; Column 4: Newton polytope where each point corresponds to the exponent vector of a monomial of the numerator of (e.g. (1, 2) is the exponent vector of the monomial ), blue points are the vertices of the Newton polytope and red numbers indicate the exponents of the red monomials in column 2.

doi: https://doi.org/10.1371/journal.pcbi.1005751.g004