Atlas › Modular forms › Weight 2 › Level 376 › 376.2.a › 376.2.a.c

Newform orbit 376.2.a.c

Trace form

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

$4q - q^{3} + 4q^{5} - 3q^{7} + 7q^{9} + 4q^{11} + 12q^{13} + 4q^{15} + 3q^{17} - 2q^{19} + 12q^{21} + 8q^{23} + O(q^{25})$

Coefficient field

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

$x^{4} - 11x^{3} - 69x^{2} + 554x + 1516$

Atkin–Lehner signs

$p$	$w_p$
2	— ( $2^2 \mid 376$ )
47	$+1$

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
$\operatorname{tr} a_p$	0	−1	4	−3	4	12	3	−2	8	8	−2	13	4	−8	−4	21	1	−3	−24	1	−18	−7	−8	9	−37

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

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.293 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, 4, 8, 47, 94, 188, 376]: [0, 1, 2, 3, 5, 14, 27, 52] (certified at ell = 2147483137)
T = [(3, 1), (5, 3)]; h of degree 12 = 1 x 12 (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(376, 2)[2]   # 376.2.a.c

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

cargo run --release -p sagebrush-web --example atlas -- 376:2 1000