Gray, JamesWang, Juntao2022-07-252022-07-252022-07-19Journal of High Energy Physics. 2022 Jul 19;2022(7):116http://hdl.handle.net/10919/111346Non-simply connected Calabi-Yau threefolds play a central role in the study of string compactifications. Such manifolds are usually described by quotienting a simply connected Calabi-Yau variety by a freely acting discrete symmetry. For the Calabi-Yau threefolds described as complete intersections in products of projective spaces, a classification of such symmetries descending from linear actions on the ambient spaces of the varieties has been given in [16]. However, which symmetries can be described in this manner depends upon the description that is being used to represent the manifold. In [24] new, favorable, descriptions were given of this data set of Calabi-Yau threefolds. In this paper, we perform a classification of cyclic symmetries that descend from linear actions on the ambient spaces of these new favorable descriptions. We present a list of 129 symmetries/non-simply connected Calabi-Yau threefolds. Of these, at least 33, and potentially many more, are topologically new varieties.application/pdfenCreative Commons Attribution 4.0 InternationalArticle - Refereed2022-07-24The Author(s)https://doi.org/10.1007/JHEP07(2022)116