References
Ade, Peter AR, et al. "Planck 2013 results. XXVI. Background geometry and topology of the Universe." Astronomy & Astrophysics 571 (2014): A26.
Akrami, Yashar, et al. "The Search for the Topology of the Universe Has Just Begun." arXiv preprint arXiv:2210.11426 (2022).
Cornish, Neil J., and Jeffrey R. Weeks. "Measuring the shape of the universe." arXiv preprint astro-ph/9807311 (1998).
Hitchman, Michael P. “Geometry with an Introduction to Cosmic Topology.” GCT Front Matter, mphitchman.com/geometry/frontmatter.html. Accessed 25 July 2023.
Lykken, Sara. “Harmonics Echoing Across Time and Space: A Summary of Research on the Topology of the Universe.” Emory University, 2010.
Weeks, Jeffrey R.. “The Poincaré Dodecahedral Space and the Mystery of the Missing Fluctuations.” (2004).
Here are some resources that you may find interesting!
The Eight Thurston Geometries
https://www.3-dimensional.space/geometries/What is Topology
https://uwaterloo.ca/pure-mathematics/about-pure-math/what-is-pure-math/what-is-topologyGeometry with an Introduction to Cosmic Topology
https://mphitchman.com/geometry/frontmatter.htmlTopology 101: The Hole Truth
https://www.quantamagazine.org/topology-101-how-mathematicians-study-holes-20210126/Anisotropy: an overview
https://www.sciencedirect.com/topics/neuroscience/anisotropyWhat shape is the universe?
https://www.astronomy.com/science/what-shape-is-the-universe/