FB research has their own version of automatic differentiation of WFSTs: https://github.com/gtn-org/gtn https://github.com/gtn-org/gtn See also https://github.

FB research has their own version of automatic differentiation of WFSTs: https://github.com/gtn-org/gtn https://github.com/gtn-org/gtn See also https://github.com/facebookresearch/gtn_applications https://github.com/facebookresearch/gtn_applications which contains examples of applications such as handwriting recognition and speech recognition.