Invariant elements under some congruence subgroups for irreducible GL2(Qp) representations over Fp
Résumé
Let p be an odd prime number. Using the explicit description for irreducible GL2 (Qp )-representations over Fp made in our previous works, we determine all invariant elements of such representations under the actions of the congruence subgroups K_t , I_t , for any integer t>0. In particular, we have the dimension of the K_t -invariants for supersingular representations of GL2 (Qp ), for any t>1.
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