question about alpha

[quxue]

Alpha is learnable in the paper, but inside the code
"Flags.metric_multiplier_trainable=False" means that alpha is a fixed value. Could you tell me why?

[boreshkinai]

This is because alpha is cross-validated on the validation set. There has been other configurations in which alpha was learnable, that included the polynomial with learnable coefficients of the metric fed into softmax.