For the B deme, the population size remained at 7925 until 9714.3119 generations ago, at which point a exponential reduction took place until 9656.3161 generations for size 2950. Afterward, the population saw an exponential growth to 3027 by 3001.619. From 3001.619 generations ago to today, there's been a exponential reduction from 3027 to 2245.
time_units: generations
demes:
  - name: B
    start_time: .inf
    epochs:
      - start_size: 7925
        end_time: 9714.3119
      - start_size: 7925
        end_size: 2950
        end_time: 9656.3161
        size_function: exponential
      - start_size: 2950
        end_time: 3001.619
        end_size: 3027
        size_function: exponential
      - end_time: 0
        start_size: 3027
        end_size: 2245
        size_function: exponential