Cohen–Lenstra Heuristics of Quadratic Number Fields
We establish a link between some heuristic asymptotic formulas (due to Cohen and Lenstra) concerning the moments of the p–part of the class groups of quadratic fields and formulas giving the frequency of the values of the p–rank of these class groups.
Furthermore we report on new results for 4–ranks of class groups of quadratic number fields.
KeywordsAbelian Group Limit Point Class Group Vector Subspace Quadratic Number
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