Atlas › Modular forms › Weight 4 › Level 17 › 17.4.a › 17.4.a.b

Newform orbit 17.4.a.b

Trace form

The 3 newforms in this orbit are conjugate over $\mathbb{Q}$ ; the sum of their $q$ -expansions is

$3q + q^{2} + 4q^{3} + 25q^{4} - 8q^{5} - 74q^{6} + 22q^{7} - 39q^{8} + 59q^{9} - 56q^{10} - 28q^{11} + 22q^{12} + 30q^{13} + 92q^{14} + 108q^{15} + 137q^{16} - 51q^{17} - 103q^{18} + 80q^{19} - 168q^{20} - 192q^{21} + 286q^{22} + 142q^{23} - 666q^{24} + O(q^{25})$

Coefficient field

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

$x^{3} - 5x^{2} - 8x + 46$

Atkin–Lehner signs

$p$	$w_p$
17	$+1$

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
$\operatorname{tr} a_p$	1	4	−8	22	−28	30	−51	80	142	−456	230	356	−294	556	640	302	636	−84	1008	−402	838	−594	−2396	−170	−270

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

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.089 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 engine's checks

dim M^+ at levels [1, 17]: [1, 6] (certified at ell = 2147483489)
T = [(2, 1), (3, 1)]; h of degree 4 = 1 x 4 (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(17, 4)[1]   # 17.4.a.b

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

cargo run --release -p sagebrush-web --example atlas -- 17:4 1000