Atlas › Modular forms › Weight 2 › Level 975 › 975.2.a › 975.2.a.r

Newform orbit 975.2.a.r

Trace form

The 5 newforms in this orbit are conjugate over $\mathbb{Q}$ ; the sum of their $q$ -expansions is

$5q - 5q^{3} + 6q^{4} - 5q^{7} + 5q^{9} + 5q^{11} - 6q^{12} - 5q^{13} + 12q^{14} + 5q^{17} + 8q^{19} + 5q^{21} + 8q^{22} + 7q^{23} + O(q^{25})$

Coefficient field

The coefficients $a_n$ generate a number field of degree 5. It is generated by the eigenvalue $\alpha$ of $T = T_{2} + 2T_{7} + 3T_{11} + 4T_{17} + 5T_{19} + 6T_{23} + 7T_{29} + 8T_{31}$ , whose minimal polynomial is

$x^{5} - 259x^{4} + 13480x^{3} + 355284x^{2} - 19408271x - 338011087$

Atkin–Lehner signs

$p$	$w_p$
3	$+1$
5	— ( $5^2 \mid 975$ )
13	$+1$

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
$\operatorname{tr} a_p$	0	−5	0	−5	5	−5	5	8	7	8	12	−17	5	−12	10	13	8	13	−28	5	14	1	6	19	13

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

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 1.111 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, 5, 13, 15, 25, 39, 65, 75, 195, 325, 975]: [0, 1, 1, 1, 4, 3, 6, 8, 12, 32, 36, 144] (certified at ell = 2147482921)
T = [(2, 1), (7, 2), (11, 3), (17, 4), (19, 5), (23, 6), (29, 7), (31, 8)]; h of degree 38 = 1 x 38 (phi(ord eps) x dim S_k^new); 11 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(975, 2)[17]   # 975.2.a.r

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

cargo run --release -p sagebrush-web --example atlas -- 975:2 1000