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

Newform orbit 18.12.a.c

$q$ -expansion

$q + 32q^{2} + 1024q^{4} - 5766q^{5} + 72464q^{7} + 32768q^{8} - 184512q^{10} + 408948q^{11} + 1367558q^{13} + 2318848q^{14} + 1048576q^{16} - 5422914q^{17} + 15166100q^{19} - 5904384q^{20} + 13086336q^{22} + 52194072q^{23} + O(q^{25})$

Coefficient field

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

$x - 66698$

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	−5766	72464	408948	1367558	−5422914	15166100	52194072	−118581150	−57652408	−375985186	−856316202	−1245189172	1306762656	−409556358	2882866260	5731767302	3893272244	9075890088	−15571822822	−30196762600	−23135252628	25614819990	−61937553406

$\operatorname{tr} a_n$ 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)[2]   # 18.12.a.c

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

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