sentence1: we use the adam optimizer for meta-learning with a learning rate of 1e-3 , which decays by a factor of 10 after 4,000 steps , for a total of 8,000 steps .
sentence2: we use the adam optimiser with a learning rate scheduler that reduces the initial rate of 1e-5 by half every 20 epochs until it reaches a minimum rate of 1e-8 .