Atlas › Modular forms › Weight 8 › Level 30 › 30.8.a › 30.8.a.b

Newform orbit 30.8.a.b

$q$ -expansion

$q - 8q^{2} - 27q^{3} + 64q^{4} + 125q^{5} + 216q^{6} + 416q^{7} - 512q^{8} + 729q^{9} - 1000q^{10} - 3948q^{11} - 1728q^{12} - 7978q^{13} - 3328q^{14} - 3375q^{15} + 4096q^{16} - 34014q^{17} - 5832q^{18} + 3020q^{19} + 8000q^{20} - 11232q^{21} + 31584q^{22} - 66528q^{23} + 13824q^{24} + O(q^{25})$

Coefficient field

The coefficients $a_n$ generate $\mathbb{Q}$ . The eigenvalue of $T = T_{7} + T_{11}$ is a root of

$x + 3532$

Atkin–Lehner signs

$p$	$w_p$
2	$+1$
3	$+1$
5	$-1$

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
$\operatorname{tr} a_p$	−8	−27	125	416	−3948	−7978	−34014	3020	−66528	−18570	208832	−301474	−460998	343052	−1356264	617982	939540	−204298	−758524	912072	3043322	6010880	9723012	7160010	−16785214

$\operatorname{tr} a_n$ 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 30, against the semicircle $\tfrac{2}{\pi}\sqrt{1 - x^2}$ :

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.299 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, 5, 6, 10, 15, 30]: [1, 3, 3, 5, 9, 13, 16, 46] (certified at ell = 2147483629)
T = [(7, 1), (11, 1)]; h of degree 6 = 1 x 6 (phi(ord eps) x dim S_k^new); 3 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(30, 8)[1]   # 30.8.a.b

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

cargo run --release -p sagebrush-web --example atlas -- 30:8 1000