TensorFlow API r1.11 Python tf.keras.backend.softsign tf.keras.backend.softsign(x) Defined in tensorflow/python/keras/backend.py. Softsign of a tensor. Arguments: x: A tensor or variable. Returns: A tensor. Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 3.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates. Last updated September 27, 2018.