Atlas › Modular forms › Weight 2 › Level 425 › 425.2.a › 425.2.a.f

Newform orbit 425.2.a.f

Trace form

The 2 newforms in this orbit are conjugate over $\mathbb{Q}$ ; the sum of their $q$ -expansions is

$2q + 2q^{2} + 4q^{3} + 2q^{4} + 4q^{7} + 6q^{8} + 6q^{9} - 8q^{11} - 4q^{12} + 8q^{14} + 6q^{16} + 2q^{17} - 10q^{18} + 4q^{21} - 12q^{22} + 4q^{23} + 8q^{24} + O(q^{25})$

Coefficient field

The coefficients $a_n$ generate $\mathbb{Q}(\sqrt{2})$ . It is generated by the eigenvalue $\alpha$ of $T = T_{2} + 3T_{3}$ , whose minimal polynomial is

$x^{2} - 14x + 41$

Atkin–Lehner signs

$p$	$w_p$
5	— ( $5^2 \mid 425$ )
17	$-1$

For $p \parallel N$ every form in the orbit has $a_p = -p^{k/2-1} w_p$ .

Traces of Hecke eigenvalues

$p$	2	3	5	7	11	13	17	19	23	29	31	37	41	43	47	53	59	61	67	71	73	79	83	89	97
$\operatorname{tr} a_p$	2	4	0	4	−8	0	2	0	4	−4	0	4	4	−4	4	−12	−24	4	12	0	4	8	4	−16	4

$\operatorname{tr} a_n$ for every $n \le 1000$ is in the JSON.

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.308 s (one thread) and proven: the dimensions are certified, and the characteristic polynomial of $T$ over $\mathbb{Z}$ is reconstructed by CRT past a rigorous coefficient bound. The label, dimension and $\operatorname{tr} a_p$ for every $p < 1000$ equal LMFDB's.

The engine's checks

dim M^+ at levels [1, 5, 17, 25, 85, 425]: [0, 1, 2, 3, 10, 46] (certified at ell = 2147482801)
T = [(2, 1), (3, 3)]; h of degree 26 = 1 x 26 (phi(ord eps) x dim S_k^new); 4 primes, 0 rejected

Open in the notebook · JSON · stored data

Recompute it yourself

In Sage mode at sagebrush.space (or npx sagebrush --sage):

newform_orbits(425, 2)[5]   # 425.2.a.f

With the Rust engine (source), in engine/:

cargo run --release -p sagebrush-web --example atlas -- 425:2 1000