====== Safety Exploration ======

  * Safety Gym, OpenAI, 2019-11-23
    * https://openai.com/blog/safety-gym/
    * Benchmarking Safe Exploration in Deep Reinforcement Learning
      * https://d4mucfpksywv.cloudfront.net/safexp-short.pdf
    * Constrained Policy Optimization
      * https://arxiv.org/abs/1705.10528