Atlas › Modular forms › Weight 2 › Level 422 › 422.2.a › 422.2.a.c

Newform orbit 422.2.a.c

Trace form

The 3 newforms in this orbit are conjugate over $\mathbb{Q}$ ; the sum of their $q$ -expansions is

$3q - 3q^{2} - q^{3} + 3q^{4} - 5q^{5} + q^{6} - 5q^{7} - 3q^{8} + 8q^{9} + 5q^{10} + 9q^{11} - q^{12} - 11q^{13} + 5q^{14} - 6q^{15} + 3q^{16} - 7q^{17} - 8q^{18} - 14q^{19} - 5q^{20} - 15q^{21} - 9q^{22} + 9q^{23} + q^{24} + O(q^{25})$

Coefficient field

The coefficients $a_n$ generate a number field of degree 3. It is generated by the eigenvalue $\alpha$ of $T = T_{3} + 3T_{5} + 5T_{7} + 7T_{11}$ , whose minimal polynomial is

$x^{3} - 22x^{2} - 579x + 125$

Atkin–Lehner signs

$p$	$w_p$
2	$+1$
211	$+1$

For $p \parallel N$ every form in the orbit has $a_p = -p^{k/2-1} w_p$ . The Fricke sign is $w_N = +1$ , so the sign of the functional equation is $(-1)^{k/2} w_N = -1$ : each L-function in the orbit has odd analytic rank.

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
$\operatorname{tr} a_p$	−3	−1	−5	−5	9	−11	−7	−14	9	2	−7	−12	3	−15	−6	−15	13	−7	5	19	−3	4	−8	−11	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 0.302 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, 2, 211, 422]: [0, 1, 18, 55] (certified at ell = 2147482681)
T = [(3, 1), (5, 3), (7, 5), (11, 7)]; h of degree 18 = 1 x 18 (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(422, 2)[2]   # 422.2.a.c

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

cargo run --release -p sagebrush-web --example atlas -- 422:2 1000