Atlas › Modular forms › Weight 6 › Level 75 › 75.6.a › 75.6.a.j

Newform orbit 75.6.a.j

Trace form

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

$2q + 9q^{2} - 18q^{3} + 21q^{4} - 81q^{6} + 108q^{7} + 207q^{8} + 162q^{9} + 168q^{11} - 189q^{12} + 1296q^{13} + 1554q^{14} + 1105q^{16} + 576q^{17} + 729q^{18} - 1336q^{19} - 972q^{21} + 5562q^{22} + 5904q^{23} - 1863q^{24} + O(q^{25})$

Coefficient field

The coefficients $a_n$ generate $\mathbb{Q}(\sqrt{89})$ . It is generated by the eigenvalue $\alpha$ of $T = T_{2} + T_{7}$ , whose minimal polynomial is

$x^{2} - 117x - 10484$

Atkin–Lehner signs

$p$	$w_p$
3	$+1$
5	— ( $5^2 \mid 75$ )

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
$\operatorname{tr} a_p$	9	−18	0	108	168	1296	576	−1336	5904	−3552	−11648	14688	1812	−7560	3240	−22176	57336	−30140	−5184	17424	−3456	−57520	133992	136764	85536

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

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.272 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, 3, 5, 15, 25, 75]: [1, 3, 3, 12, 13, 52] (certified at ell = 2147482921)
T = [(2, 1), (7, 1)]; h of degree 15 = 1 x 15 (phi(ord eps) x dim S_k^new); 4 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(75, 6)[9]   # 75.6.a.j

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

cargo run --release -p sagebrush-web --example atlas -- 75:6 1000