Atlas › Modular forms › Weight 6 › Level 108 › 108.6.a › 108.6.a.c

Newform orbit 108.6.a.c

Trace form

The 2 newforms in this orbit are conjugate over $\mathbb{Q}$ ; the sum of their $q$ -expansions is

$2q - 32q^{7} + 486q^{11} + 208q^{13} + 1944q^{17} - 632q^{19} + 6804q^{23} + O(q^{25})$

Coefficient field

The coefficients $a_n$ generate $\mathbb{Q}(\sqrt{41})$ . It is generated by the eigenvalue $\alpha$ of $T = T_{5} + T_{7}$ , whose minimal polynomial is

$x^{2} + 32x - 52880$

Atkin–Lehner signs

$p$	$w_p$
2	— ( $2^2 \mid 108$ )
3	— ( $3^2 \mid 108$ )

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	0	0	−32	486	208	1944	−632	6804	11664	3328	−9956	13608	4960	18468	−11664	1944	8176	90064	−44712	−121214	28768	−15066	−178848	88942

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

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.308 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, 4, 6, 9, 12, 18, 27, 36, 54, 108]: [1, 2, 3, 4, 7, 6, 13, 17, 16, 33, 47, 93] (certified at ell = 2147483647)
T = [(5, 1), (7, 1)]; h of degree 7 = 1 x 7 (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(108, 6)[2]   # 108.6.a.c

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

cargo run --release -p sagebrush-web --example atlas -- 108:6 1000