# Maass forms of levels 1 to 15 with $0 \leq R\leq 15$

The horizontal axis is the spectral parameter $R$ with the Laplace eigenvalue satisfying $\lambda=1/4+R^2$. The vertical axis is the level $N$. Each point corresponds to a Maass form of weight 0 and trivial character on $\Gamma_0(N)$ with the color showing whether the symmetry is **even** or **odd**.

In the plot below each dot is linked to the homepage of the corresponding Maass forms.