Atlas › Modular forms › Weight 2 › Level 961 › 961.2.a › 961.2.a.i

Newform orbit 961.2.a.i

Trace form

The 8 newforms in this orbit are conjugate over $\mathbb{Q}$ ; the sum of their $q$ -expansions is

$8q + 2q^{2} - 3q^{3} + 8q^{4} + 3q^{5} - 11q^{6} - 2q^{7} - 9q^{8} + 5q^{9} - 13q^{10} - 18q^{11} - 8q^{13} - 9q^{14} - 18q^{15} + 4q^{16} - 14q^{17} + 23q^{18} - 6q^{19} - 7q^{20} + q^{21} - 4q^{22} - 22q^{23} - 30q^{24} + O(q^{25})$

Coefficient field

The coefficients $a_n$ generate a number field of degree 8. It is generated by the eigenvalue $\alpha$ of $T = T_{2} + 3T_{3}$ , whose minimal polynomial is

$x^{8} + 7x^{7} - 85x^{6} - 628x^{5} + 1414x^{4} + 14388x^{3} + 9870x^{2} - 41967x - 15399$

Atkin–Lehner signs

$p$	$w_p$
31	— ( $31^2 \mid 961$ )

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
$\operatorname{tr} a_p$	2	−3	3	−2	−18	−8	−14	−6	−22	−12	0	8	−22	2	−18	−6	−4	−30	−13	−1	−2	−8	−39	−27	34

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

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.264 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, 31, 961]: [0, 3, 83] (certified at ell = 2147477881)
T = [(2, 1), (3, 3)]; h of degree 63 = 1 x 63 (phi(ord eps) x dim S_k^new); 9 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(961, 2)[8]   # 961.2.a.i

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

cargo run --release -p sagebrush-web --example atlas -- 961:2 1000