MBJC - Reading Material |
MBJC HOME | AMATH HOME |
TIME : Fridays, 3:30pm - 4:20pm PLACE : GUG 415-L
| Date | Speaker | Topic and Reading Material |
| 4/11 | Victoria Lu |
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| 4/18 | Jonathan Claridge |
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| 4/25 | Lisa Bishop |
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| 5/2 | Peizhe Shi |
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| 5/9 | Josh Goldwyn |
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| 5/16 | Justine Gunog Seo | The dynamics of a simple laissez-faire model with two predators, < Abstract > In this paper, we study the dynamics of a laissez-faire predator-prey model with both a specialist and a generalist predator. We analyze the stabilities of equilibria by performing linearized stability analyses. We then reexamine the stability of the equilibrium where the prey and predator coexist by constructing a Lyapunov function. If we hold the generalist predator population constant, treating it as a bifurcation parameter, we show that our model can possess multiple (up to three) limit cycles that surround an equilibrium in the interior of the first quadrant. Our model shows rich dynamics including fold, transcritical, pitchfork, Hopf, cyclic-fold, and Bautin bifurcations as well as heteroclinic connections. If we instead vary the generalist predator population slowly across bifurcations, the model exhibits bursting behavior with alternation between a repetitive spiking phase and a quiescent phase. |
| 5/23 | Tom Trogdon |
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| 5/30 | Mona Usmani |
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| 6/6 | Canceled | No Meeting This Week - Enjoy Summer Break! |