Atlas › Modular forms › Weight 4 › Level 154 › 154.4.a › 154.4.a.i

Newform orbit 154.4.a.i

Trace form

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

$3q + 6q^{2} + 6q^{3} + 12q^{4} + 26q^{5} + 12q^{6} - 21q^{7} + 24q^{8} + 59q^{9} + 52q^{10} + 33q^{11} + 24q^{12} + 72q^{13} - 42q^{14} + 12q^{15} + 48q^{16} + 56q^{17} + 118q^{18} - 48q^{19} + 104q^{20} - 42q^{21} + 66q^{22} - 244q^{23} + 48q^{24} + O(q^{25})$

Coefficient field

The coefficients $a_n$ generate a number field of degree 3. It is generated by the eigenvalue $\alpha$ of $T = T_{3} + 3T_{5} + 5T_{13} + 7T_{17} + 9T_{19}$ , whose minimal polynomial is

$x^{3} - 404x^{2} - 1468728x - 477986832$

Atkin–Lehner signs

$p$	$w_p$
2	$-1$
7	$+1$
11	$-1$

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 even 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
$\operatorname{tr} a_p$	6	6	26	−21	33	72	56	−48	−244	198	374	110	−648	−500	−326	206	−266	308	256	−484	−1028	−1072	912	3406	2042

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

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.213 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 engine's checks

dim M^+ at levels [1, 2, 7, 11, 14, 22, 77, 154]: [1, 2, 3, 4, 8, 11, 26, 76] (certified at ell = 2147482951)
T = [(3, 1), (5, 3), (13, 5), (17, 7), (19, 9)]; h of degree 14 = 1 x 14 (phi(ord eps) x dim S_k^new); 6 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(154, 4)[8]   # 154.4.a.i

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

cargo run --release -p sagebrush-web --example atlas -- 154:4 1000