Atlas › Modular forms › Weight 2 › Level 132 › 132.2.a › 132.2.a.b

Newform orbit 132.2.a.b

$q$ -expansion

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

Coefficient field

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

$x$

Atkin–Lehner signs

$p$	$w_p$
2	— ( $2^2 \mid 132$ )
3	$-1$
11	$-1$

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 132.b (Cremona's 132a). Its optimal curve 132a1 is

$y^2 = x^3 + x^2 + 3x$

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	1	−2	4	−6	0	−8	−8	10	8	−2	−8	−2	12	10	12	8	6	−2	16	−14	−2

$\operatorname{tr} a_n$ 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 132, against the semicircle $\tfrac{2}{\pi}\sqrt{1 - x^2}$ :

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.1 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, 11, 12, 22, 33, 44, 66, 132]: [0, 1, 1, 2, 3, 2, 5, 5, 6, 9, 16, 30] (certified at ell = 2147483171)
T = [(5, 1), (7, 1)]; h of degree 2 = 1 x 2 (phi(ord eps) x dim S_k^new); 1 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(132, 2)[1]   # 132.2.a.b

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

cargo run --release -p sagebrush-web --example atlas -- 132:2 1000