Proceedings of Machine Learning Research
This volume compiles a selection of papers associated with the fourth edition of the Demonstration and Competition Track at NeurIPS 2020. The track comprised 16 competitions and 20 demonstrations. Competition and demonstration proposals were subject to a strict reviewing process to ensure the quality of the accepted events. After a selective process, the accepted competitions and demonstrations were featured at the NeurIPS 2020 main conference. A wide diversity of machine learning topics were covered with competitions and demonstrations. The latter included innovative ways of interacting with participants due to the virtual format of NeurIPS2020.