def test_arctanh(t: Tensor) -> Tensor:
return ep.arctanh((t - t.mean()) / t.max())
def verify_input_bounds(input: ep.Tensor, model: Model) -> None:
# verify that input to the attack lies within model's input bounds
assert input.min().item() >= model.bounds.lower
assert input.max().item() <= model.bounds.upper