@article{576,
  author = {Sean Molesky and Pengning Chao and Alejandro Rodriguez},
  title = {Causality, passivity and optimization:  Strong duality in quadratically constrained quadratic programs for waves},
  year = {2021},
  journal = {arXiv:Xiv:2105.02154},
  url = {https://arxiv.org/abs/2105.02154},
}