The compatible Galois representations conjecture for regular L-algebraic cuspidal representations

Let LL) be a number field and let π\pi be a cuspidal automorphic representation of GLn(AL)\operatorname{GL}_n(\mathbb A_L) that is LL-algebraic and regular. For a prime pp and an isomorphism ι:QpC\iota:\overline{\mathbb Q}_p\cong\mathbb C, write ΓL\Gamma_L for the absolute Galois group of LL. The compatible Galois representations conjecture. There exists a continuous, semisimple representation

rp,ι(π):ΓLGLn(Qp)r_{p,\iota}(\pi):\Gamma_L\to\operatorname{GL}_n(\overline{\mathbb Q}_p)

such that, for all but finitely many finite places vv of LL at which πv\pi_v is unramified, the restriction rp,ι(π)ΓLvr_{p,\iota}(\pi)|_{\Gamma_{L_v}} is unramified and the semisimple conjugacy class of rp,ι(π)(Frobv)r_{p,\iota}(\pi)(\operatorname{Frob}_v) equals the Satake parameter of ι1πv\iota^{-1}\pi_v. This predicts the Galois representations attached to regular LL-algebraic automorphic representations of general linear groups; the statement is presented as a conjecture here, with no resolution specified in the source.

Sources & referencesView supporting material

Primary source

Christian Johansson and Jack A. Thorne, “On subquotients of the etale cohomology of Shimura varieties”, arXiv:1908.10429 (2019).

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