The U deme had a size of 4814 until 4721.158 generations ago. From 4721.158 generations to time 2687.95, its size increased exponentially to 6748 individuals. After that, until 582.379, the population had a linear reduction to 5316 individuals. It then increased from 5316 to 8434, starting 582.379 generations ago, until current times, at a linear rate.
time_units: generations
demes:
  - name: U
    start_time: .inf
    epochs:
      - start_size: 4814
        end_time: 4721.158
      - start_size: 4814
        end_size: 6748
        end_time: 2687.95
        size_function: exponential
      - start_size: 6748
        end_time: 582.379
        end_size: 5316
        size_function: linear
      - end_time: 0
        start_size: 5316
        end_size: 8434
        size_function: linear