Atlas › Modular forms › Weight 2 › Level 555 › 555.2.a › 555.2.a.c

Newform orbit 555.2.a.c

Trace form

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

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

Coefficient field

The coefficients $a_n$ generate $\mathbb{Q}(\sqrt{5})$ . It is generated by the eigenvalue $\alpha$ of $T = T_{2} + T_{7}$ , whose minimal polynomial is

$x^{2} + 7x + 11$

Atkin–Lehner signs

$p$	$w_p$
3	$-1$
5	$-1$
37	$+1$

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	2	2	−4	−3	−10	−11	−7	−8	−9	4	−2	10	5	−4	−4	13	−12	−1	3	1	3	3	12	−16

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

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.235 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, 15, 37, 111, 185, 555]: [0, 1, 1, 4, 3, 14, 20, 80] (certified at ell = 2147483629)
T = [(2, 1), (7, 1)]; h of degree 23 = 1 x 23 (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(555, 2)[2]   # 555.2.a.c

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

cargo run --release -p sagebrush-web --example atlas -- 555:2 1000