Atlas › Modular forms › Weight 12 › Level 18 › 18.12.a › 18.12.a.b

Newform orbit 18.12.a.b

$q$ -expansion

$q - 32q^{2} + 1024q^{4} + 5280q^{5} - 49036q^{7} - 32768q^{8} - 168960q^{10} + 414336q^{11} - 522982q^{13} + 1569152q^{14} + 1048576q^{16} + 9499968q^{17} + 13053944q^{19} + 5406720q^{20} - 13258752q^{22} + 58755840q^{23} + O(q^{25})$

Coefficient field

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

$x + 43756$

Atkin–Lehner signs

$p$	$w_p$
2	$+1$
3	— ( $3^2 \mid 18$ )

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
$\operatorname{tr} a_p$	−32	0	5280	−49036	414336	−522982	9499968	13053944	58755840	−117142944	142907156	718521806	−668055360	141575864	729235200	4917225312	1408015104	−3223327018	−2358681328	−22245092352	−28036594330	−20685045676	37818604416	11288711808	−115724393266

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

Sato–Tate

The normalized $a_p / 2p^{11/2}$ for the primes $p < 1000$ not dividing 18, against the semicircle $\tfrac{2}{\pi}\sqrt{1 - x^2}$ :

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.361 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]: [2, 4, 5, 13, 12, 35] (certified at ell = 2147483647)
T = [(5, 1), (7, 1)]; h of degree 5 = 1 x 5 (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(18, 12)[1]   # 18.12.a.b

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

cargo run --release -p sagebrush-web --example atlas -- 18:12 1000