@article{hefford2022spacetime, title = "On the pre- and promonoidal structure of spacetime", author = "Hefford, James and Kissinger, Aleks", year = "2022", journal = "arXiv Preprint", note = "Submitted to ACT 2022", url = "https://arxiv.org/abs/2206.09678", volume = "arXiv:2206.09678", }