Markos Karameris

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20192026

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math.NT2026

Hecke Subalgebras and Local Newforms for the Metaplectic Double Cover of $\SL_2(\mathbb Q_p)$

Ehud Moshe Baruch, Markos Karameris, Soma Purkait

We determine an explicit compact Hecke subalgebra for the metaplectic double cover of $\SL_2(\mathbb Q_p)$ at the congruence subgroup $K_{0} (p^{n})$ , for odd $p$ , and use it to study l…

math.NT2023

Eigenspaces of Newforms with Nontrivial Character

Markos Karameris

Let $S_{k} (Γ_{0} (N), χ)$ denote the space of holomorphic cuspforms with Dirichlet character $χ$ and modular subgroup $Γ_{0} (N)$ . We will characterize the space of newforms $S_{k}^{new}(…