The U deme had a size of 2780 until 8921.73 generations ago. From 8921.73 generations to time 7691.0192, its size changed linearly to 5905 individuals. After that, until 2115.8, the population had a exponential reduction to 5776 individuals. It then increased from 5776 to 9104, starting 2115.8 generations ago, until current times, at a linear rate.
time_units: generations
demes:
  - name: U
    start_time: .inf
    epochs:
      - start_size: 2780
        end_time: 8921.73
      - start_size: 2780
        end_size: 5905
        end_time: 7691.0192
        size_function: linear
      - start_size: 5905
        end_time: 2115.8
        end_size: 5776
        size_function: exponential
      - end_time: 0
        start_size: 5776
        end_size: 9104
        size_function: linear