Atlas › Modular forms › Weight 2 › Level 801 › 801.2.a › 801.2.a.k

Newform orbit 801.2.a.k

Trace form

The 7 newforms in this orbit are conjugate over $\mathbb{Q}$ ; the sum of their $q$ -expansions is

$7q + 4q^{2} + 6q^{4} + 4q^{5} + 12q^{8} + 2q^{10} + 16q^{11} - 2q^{13} + 8q^{14} + 8q^{17} - 6q^{19} + 12q^{20} + 2q^{22} + 17q^{23} + O(q^{25})$

Coefficient field

The coefficients $a_n$ generate a number field of degree 7. It is generated by the eigenvalue $\alpha$ of $T = T_{2} + 2T_{5} + 3T_{7} + 4T_{11} + 5T_{13} + 6T_{17} + 7T_{19} + 8T_{23}$ , whose minimal polynomial is

$x^{7} - 208x^{6} + 2893x^{5} + 1825872x^{4} - 152590792x^{3} + 5013725552x^{2} - 73997231891x + 404158348504$

Atkin–Lehner signs

$p$	$w_p$
3	— ( $3^2 \mid 801$ )
89	$-1$

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
$\operatorname{tr} a_p$	4	0	4	0	16	−2	8	−6	17	17	−2	0	13	2	20	−2	19	4	−11	36	−11	−15	19	7	−17

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

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.473 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 label, dimension and $\operatorname{tr} a_p$ for every $p < 1000$ equal LMFDB's.

The engine's checks

dim M^+ at levels [1, 3, 9, 89, 267, 801]: [0, 1, 2, 8, 32, 92] (certified at ell = 2147482921)
T = [(2, 1), (5, 2), (7, 3), (11, 4), (13, 5), (17, 6), (19, 7), (23, 8)]; h of degree 36 = 1 x 36 (phi(ord eps) x dim S_k^new); 10 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(801, 2)[10]   # 801.2.a.k

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

cargo run --release -p sagebrush-web --example atlas -- 801:2 1000