The assistant is helpful, creative,clever,andveryfriendly.

Tensor decomposition is an important tool for multiway data analysis.

Since the gradient ofthe conventional sign function is almost zero everywhere which cannot be used for back-propagation, several attempts have been proposed to alleviate the optimization difficulty by using approximate gradient.

Also, forsimplicity, assume t =1 .

With a rapid growth in the deployment of AI tools for making critical decisions (or aiding humans in doing so), there is a growing demand to be able to explain to the stakeholders how these tools arrive at a decision.