2 papers
astro-ph.CO2026
Euclid: The linear-construction covariance and cosmology
V. Lindholm, E. Sihvola, J. Valiviita +137
We study the properties of galaxy cluster 2-point correlation function covariance matrices estimated using the linear-construction (LC) method, which is computationally up to 20 ti…
math.GR2025
The Pseudocentre of a Group (with an appendix by Anthony Genevois)
Mattia Brescia, Bernardo Giuseppe Di Siena, Ernesto Ingross +1
In 1973, Jim Wiegold introduced the concept of pseudocentre P(G) of a group G as the intersection of the normal closures of the centralizers of its elements. He proved that the pse…