SIN3004

• Linear equation

• Method of undetermined coefficients

• Variation of parameters

• Using Jacobian matrix

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Which of the following type of bifurcations have always a fixed point for all values of a parameter, and the fixed point cant never be destroyed?

• Subcritical pitchfork

• Supercritical pitchfork

• Saddle-node

• Transcritical

• Fold bifurcation

Choose the right flowchart to represent the following assumptions,

1. 1. The disease can only be transmitted via direct contact with the infected individuals.

2. 2. Once infected, the person will be brought to the hospital or recovered at home.

3. 3. Recovered individuals can be reinfected again.

4. 4. The disease has no incubation period.

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