Atlas › Modular forms › Weight 8 › Level 54 › 54.8.a › 54.8.a.c

Newform orbit 54.8.a.c

$q$ -expansion

$q - 8q^{2} + 64q^{4} + 312q^{5} + 323q^{7} - 512q^{8} - 2496q^{10} + 3720q^{11} - 14179q^{13} - 2584q^{14} + 4096q^{16} + 15912q^{17} + 22421q^{19} + 19968q^{20} - 29760q^{22} + 57768q^{23} + O(q^{25})$

Coefficient field

The coefficients $a_n$ generate $\mathbb{Q}$ . The eigenvalue of $T = T_{5} + 3T_{7}$ is a root of

$x - 1281$

Atkin–Lehner signs

$p$	$w_p$
2	$+1$
3	— ( $3^2 \mid 54$ )

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
$\operatorname{tr} a_p$	−8	0	312	323	3720	−14179	15912	22421	57768	166656	94820	453971	627072	−42472	−1235256	107280	−2479224	2874383	1501097	4733136	−85111	−1180819	−1116528	9368136	−2039995

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

Sato–Tate

The normalized $a_p / 2p^{7/2}$ for the primes $p < 1000$ not dividing 54, against the semicircle $\tfrac{2}{\pi}\sqrt{1 - x^2}$ :

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.342 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, 3, 6, 9, 18, 27, 54]: [1, 3, 3, 9, 8, 23, 22, 65] (certified at ell = 2147483647)
T = [(5, 1), (7, 3)]; h of degree 10 = 1 x 10 (phi(ord eps) x dim S_k^new); 5 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(54, 8)[2]   # 54.8.a.c

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

cargo run --release -p sagebrush-web --example atlas -- 54:8 1000