ScalingStacks

Acknowledgments 1.3. JF foremost thanks Kevin Costello for many conversations on this subject, which have motivated and clarified this work, from Theorem 3.24 to the computations of the following sections, and without which JF likely would not have pursued it. Our joint works with Hiro Lee Tanaka build and improve on many of the ideas here, and we thank him for his collaboration. JF first learned the basic idea of factorization homology in conversations with Jacob Lurie and Dennis Gaitsgory in 2007, and we have both benefitted greatly from their generosity in sharing many other insights in these intervening years. JF thanks Sasha Beilinson and Mike Hopkins for their great influence which has shaped his thoughts on this subject. We also thank Grégory Ginot and Owen Gwilliam for helpful conversations and Pranav Pandit for comments on an earlier draft of this paper. We thank Amabel Wilson and Theo Johnson–Freyd for correcting the hypotheses in the statement of Proposition 5.3. Finally, we thank the anonymous referee whose careful feedback has considerably improved this article.