Unexpected topology of the temperature fluctuations in the cosmic microwave background Pratyush Pranav, Robert J. Adler, Thomas Buchert, Herbert Edelsbrunner, Bernard J. T. Jones, Armin Schwartzman, Hubert Wagner and Rien van de Weygaert A&A, 627 (2019) A163 Published online: 17 July 2019 DOI: 10.1051/0004-6361/201834916