The global equivariant epsilon constant conjecture

Let F/EF/E be a Galois extension with Galois group Γ\Gamma, and let TΩloc(F/E,1)T\Omega^\mathrm{loc}(F/E,1) be the locally defined element of K0(Z[Γ],R)K_0(\mathbb Z[\Gamma],\mathbb R). Global equivariant epsilon constant conjecture. One has

TΩloc(F/E,1)=0T\Omega^\mathrm{loc}(F/E,1)=0

in K0(Z[Γ],R)K_0(\mathbb Z[\Gamma],\mathbb R). This conjecture is equivalent to a conjecture of Bley and Burns and is known for at most tamely ramified extensions, abelian extensions of Q\mathbb Q with odd conductor, and extensions of Q\mathbb Q of degree at most 1515. It also implies Chinburg's Ω(2)\Omega(2)-conjecture.

Sources & referencesView supporting material

Primary source

Werner Bley and Alessandro Cobbe, “Equivariant epsilon constant conjectures for weakly ramified extensions”, arXiv:1406.3168 (2014).

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