Atlas › Modular forms › Weight 2 › Level 929 › 929.2.a › 929.2.a.a

Newform orbit 929.2.a.a

Trace form

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

$2q - 3q^{2} + 3q^{4} - q^{5} - 5q^{6} - 3q^{7} - 6q^{8} + 4q^{9} - q^{10} - 3q^{11} + 15q^{12} + 4q^{13} + 12q^{14} + 5q^{15} + 13q^{16} + 6q^{17} - 6q^{18} - 5q^{19} + 6q^{20} - 15q^{21} + 7q^{22} + 3q^{23} - 20q^{24} + O(q^{25})$

Coefficient field

The coefficients $a_n$ generate $\mathbb{Q}(\sqrt{5})$ . It is generated by the eigenvalue $\alpha$ of $T = T_{2} + T_{3}$ , whose minimal polynomial is

$x^{2} + 3x + 1$

Atkin–Lehner signs

$p$	$w_p$
929	$+1$

For $p \parallel N$ every form in the orbit has $a_p = -p^{k/2-1} w_p$ . The Fricke sign is $w_N = +1$ , so the sign of the functional equation is $(-1)^{k/2} w_N = -1$ : each L-function in the orbit has odd analytic rank.

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
$\operatorname{tr} a_p$	−3	0	−1	−3	−3	4	6	−5	3	10	−3	−13	−12	−10	−18	11	8	−22	10	−9	1	−22	−18	14	−2

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

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.291 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, 929]: [0, 78] (certified at ell = 2147480161)
T = [(2, 1), (3, 1)]; h of degree 77 = 1 x 77 (phi(ord eps) x dim S_k^new); 8 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(929, 2)[0]   # 929.2.a.a

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

cargo run --release -p sagebrush-web --example atlas -- 929:2 1000