Erez's class-group conjecture for the square root of the inverse different
Erez's class-group conjecture for the square root of the inverse different
Let be a weakly ramified Galois extension of number fields for which the square root of the inverse different exists, and set . Let be Chinburg's canonical -invariant, and let be the class-group element defined from the signs of the second Adams-operator-twisted modified Galois–Jacobi sums. Erez's conjecture. In , one has
The conjecture refines the comparison between the class of the square root of the inverse different, Chinburg's invariant, and root-number classes; the source explains that the correction term has order at most and that this conjecture contains Vinatier's odd-degree conjecture as a special case. Its status is not resolved in the supplied source.
Sources & referencesView supporting material
Primary source
Y. Kuang, “On Galois-Gauss sums and the square root of the inverse different”, arXiv:2210.10347 (2022).
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