Atlas › Modular forms › Weight 2 › Level 955 › 955.2.a › 955.2.a.f

Newform orbit 955.2.a.f

Trace form

The 17 newforms in this orbit are conjugate over $\mathbb{Q}$ ; the sum of their $q$ -expansions is

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

Coefficient field

The coefficients $a_n$ generate a number field of degree 17. It is generated by the eigenvalue $\alpha$ of $T = T_{2} + T_{3}$ , whose minimal polynomial is

$x^{17} - 12x^{16} + 15x^{15} + 331x^{14} - 1226x^{13} - 2142x^{12} + 15743x^{11} - 5264x^{10} - 75854x^{9} + 89076x^{8} + 133049x^{7} - 260116x^{6} - 18684x^{5} + 238149x^{4} - 98545x^{3} - 33975x^{2} + 21048x - 1436$

Atkin–Lehner signs

$p$	$w_p$
5	$-1$
191	$+1$

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
$\operatorname{tr} a_p$	7	5	17	8	11	20	21	−2	8	33	−8	26	11	7	9	41	−19	−2	12	17	44	−25	11	14	19

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

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.276 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, 5, 191, 955]: [0, 1, 17, 98] (certified at ell = 2147476141)
T = [(2, 1), (3, 1)]; h of degree 63 = 1 x 63 (phi(ord eps) x dim S_k^new); 7 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(955, 2)[5]   # 955.2.a.f

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

cargo run --release -p sagebrush-web --example atlas -- 955:2 1000