Atlas › Modular forms › Weight 2 › Level 382 › 382.2.a › 382.2.a.c

Newform orbit 382.2.a.c

Trace form

The 4 newforms in this orbit are conjugate over $\mathbb{Q}$ ; the sum of their $q$ -expansions is

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

Coefficient field

The coefficients $a_n$ generate a number field of degree 4. It is generated by the eigenvalue $\alpha$ of $T = T_{3} + T_{5}$ , whose minimal polynomial is

$x^{4} - 7x^{3} + 12x^{2} + x - 2$

Atkin–Lehner signs

$p$	$w_p$
2	$-1$
191	$+1$

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
$\operatorname{tr} a_p$	4	3	4	1	3	−1	−3	3	7	−5	4	−4	−5	−6	9	3	−1	−5	−15	−2	−3	−7	13	0	−11

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

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.189 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, 191, 382]: [0, 1, 17, 50] (certified at ell = 2147483171)
T = [(3, 1), (5, 1)]; h of degree 15 = 1 x 15 (phi(ord eps) x dim S_k^new); 2 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(382, 2)[2]   # 382.2.a.c

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

cargo run --release -p sagebrush-web --example atlas -- 382:2 1000