Symmetric matrix \(\Sigma(x)\) from the second-order moments of the jump
rates, obtained from the three elementary events (infection, recovery,
disease-induced death).
Usage
sird_diffusion(state, parms)
Arguments
- state
Numeric vector c(s, i, r).
- parms
Named numeric vector/list with elements lambda, gamma, alpha.
Value
A 3x3 symmetric numeric matrix.
