@techreport{pocu, title = "Profunctor Optics, a Categorical Update", author = "Bryce Clarke and Derek Elkins and Jeremy Gibbons and Fosco Loregian and Bartosz Milewski and Emily Pillmore and Mario Román", year = "2020", howpublished = "arXiv", month = "January", number = "2001.07488", url = "https://arxiv.org/abs/2001.07488", }