{
  "mean_generator": [
    [
      "-243/1250",
      "184/625"
    ],
    [
      "67/500",
      "-7/500"
    ]
  ],
  "shifted_mean_generator": [
    [
      "-243/1250",
      "184/625"
    ],
    [
      "67/500",
      "-7/500"
    ]
  ],
  "cubic_coefficients": [
    "11/468750",
    "4/234375"
  ],
  "offspring_difference": "epsilon_i * (x_S - x_T)^2",
  "scope": "Polynomial identity and mean equality exact; finite-time effect magnitudes numerical. Equality can hold with state-independent demographic rates."
}