Existence of Alternate Steady States in a Phosphorous Cycling Model

Figure 2

Definition of 𝐵_𝑅 and 𝑓^∗.

(a) 𝐵_𝑅 in Ω

(b) 𝑓^∗(𝑠)=max_{𝑡∈[0,𝑠]}𝑓(𝑡)