Atlas › Modular forms › Weight 2 › Level 732 › 732.2.a › 732.2.a.b

Newform orbit 732.2.a.b

$q$ -expansion

$q - q^{3} + 2q^{5} + 2q^{7} + q^{9} + 2q^{11} - 2q^{13} - 2q^{15} - 2q^{17} + 4q^{19} - 2q^{21} + 6q^{23} + O(q^{25})$

Coefficient field

The coefficients $a_n$ generate $\mathbb{Q}$ . The eigenvalue of $T = T_{5} + 3T_{7} + 5T_{17} + 7T_{19} + 9T_{23}$ is a root of

$x - 80$

Atkin–Lehner signs

$p$	$w_p$
2	— ( $2^2 \mid 732$ )
3	$+1$
61	$+1$

For $p \parallel N$ every form in the orbit has $a_p = -p^{k/2-1} w_p$ .

Elliptic curve

By modularity this newform is the one attached to the isogeny class 732.b (Cremona's 732a). Its optimal curve 732a1 is

$y^2 = x^3 - x^2 - 17x + 30$

of rank 0 with torsion of order 2. Its $a_p$ , computed by Sagebrush's point-counting engine, equal the newform's for every prime $p < 1000$ .

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	−1	2	2	2	−2	−2	4	6	−2	−2	2	2	6	12	6	10	−1	−2	−6	6	−14	0	6	−10

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

Sato–Tate

The normalized $a_p / 2p^{1/2}$ for the primes $p < 1000$ not dividing 732, against the semicircle $\tfrac{2}{\pi}\sqrt{1 - x^2}$ :

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.405 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, 2, 3, 4, 6, 12, 61, 122, 183, 244, 366, 732]: [0, 1, 1, 2, 3, 5, 5, 17, 22, 34, 66, 130] (certified at ell = 2147482921)
T = [(5, 1), (7, 3), (17, 5), (19, 7), (23, 9)]; h of degree 10 = 1 x 10 (phi(ord eps) x dim S_k^new); 3 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(732, 2)[1]   # 732.2.a.b

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

cargo run --release -p sagebrush-web --example atlas -- 732:2 1000