Atlas › Modular forms › Weight 2 › Level 902 › 902.2.a › 902.2.a.i

Newform orbit 902.2.a.i

Trace form

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

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

Coefficient field

The coefficients $a_n$ generate a number field of degree 5. It is generated by the eigenvalue $\alpha$ of $T = T_{3} + 3T_{5} + 5T_{7} + 7T_{13} + 9T_{17}$ , whose minimal polynomial is

$x^{5} - 8x^{4} - 3684x^{3} - 28482x^{2} + 822699x + 6809938$

Atkin–Lehner signs

$p$	$w_p$
2	$-1$
11	$-1$
41	$-1$

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 even 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
$\operatorname{tr} a_p$	5	3	−1	−4	5	4	0	15	10	−11	8	−7	5	7	−6	3	7	−31	7	2	−2	−17	−3	−6	−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 0.468 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, 11, 22, 41, 82, 451, 902]: [0, 1, 2, 5, 4, 12, 44, 130] (certified at ell = 2147482921)
T = [(3, 1), (5, 3), (7, 5), (13, 7), (17, 9)]; h of degree 35 = 1 x 35 (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(902, 2)[8]   # 902.2.a.i

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

cargo run --release -p sagebrush-web --example atlas -- 902:2 1000