The deme of O kept its population at 4750 until 8631.1363 generations ago, when a exponential reduction ensued until 6531.3607, to size 3883. Subsequently, a linear change changed the numbers to 9015 individuals by 235.0. Starting from 235.0, the population has seen a change from 9015 to 6952 at a linear pace, continuing to this day.
time_units: generations
demes:
  - name: O
    start_time: .inf
    epochs:
      - start_size: 4750
        end_time: 8631.1363
      - start_size: 4750
        end_size: 3883
        end_time: 6531.3607
        size_function: exponential
      - start_size: 3883
        end_time: 235.0
        end_size: 9015
        size_function: linear
      - end_time: 0
        start_size: 9015
        end_size: 6952
        size_function: linear