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tfa.seq2seq.safe_cumprod

Computes cumprod of x in logspace using cumsum to avoid underflow.

tfa.seq2seq.safe_cumprod(
    x: tfa.types.TensorLike,
    *args,
    **kwargs
) -> tf.Tensor

The cumprod function and its gradient can result in numerical instabilities when its argument has very small and/or zero values. As long as the argument is all positive, we can instead compute the cumulative product as exp(cumsum(log(x))). This function can be called identically to tf.cumprod.

x Tensor to take the cumulative product of.
*args Passed on to cumsum; these are identical to those in cumprod.
**kwargs Passed on to cumsum; these are identical to those in cumprod.

Cumulative product of x.