TeX:
\lim_{N \to \infty} \frac{\sum_{q=1}^{N} \# G_{q}}{\frac{1}{2} {N}^{2}} = \frac{6}{{\pi}^{2}}Definitions:
| Fungrim symbol | Notation | Short description | 
|---|---|---|
| SequenceLimit | Limiting value of sequence | |
| Sum | Sum | |
| Cardinality | Set cardinality | |
| DirichletGroup | Dirichlet characters with given modulus | |
| Pow | Power | |
| Infinity | Positive infinity | |
| Pi | The constant pi (3.14...) | 
Source code for this entry:
Entry(ID("f88596"),
    Formula(Equal(SequenceLimit(Div(Sum(Cardinality(DirichletGroup(q)), For(q, 1, N)), Mul(Div(1, 2), Pow(N, 2))), For(N, Infinity)), Div(6, Pow(Pi, 2)))))