Fabien Cléry has contributed to these Knowls: Congruence subgroup of level $N$ of $\Sp(2g,\Z)$, Degree of a Siegel modular form, Duke-Imamoglu-Ikeda lift, Irreducible representations of $\GL(g,\C)$, Koecher principle, Level of a Siegel modular form, Maass lift from Jacobi form to Siegel modular form, Siegel cusp form, Siegel cusp form of degree 2, Siegel modular form, Siegel upper half-space, Subgroup $\Gamma(N)$ of $\Sp(2g,\Z)$, Subgroup $\Gamma_0(N)$ of $\Sp(2g,\Z)$, Subgroup $\Gamma_1(N)$ of $\Sp(2g,\Z)$, Subspaces of degree 2 Siegel modular forms, Symplectic group, Vector-valued Siegel modular forms of degree 2