Atlas › Modular forms › Weight 2 › Level 695 › 695.2.a › 695.2.a.d

Newform orbit 695.2.a.d

Trace form

The 18 newforms in this orbit are conjugate over $\mathbb{Q}$ ; the sum of their $q$ -expansions is

$18q - 2q^{2} + 2q^{3} + 26q^{4} - 18q^{5} + 7q^{6} + 5q^{7} - 6q^{8} + 34q^{9} + 2q^{10} + 5q^{11} + 2q^{12} + 17q^{13} + 5q^{14} - 2q^{15} + 34q^{16} + q^{17} + 5q^{18} + 19q^{19} - 26q^{20} + 16q^{21} - q^{22} - 14q^{23} + 32q^{24} + O(q^{25})$

Coefficient field

The coefficients $a_n$ generate a number field of degree 18. It is generated by the eigenvalue $\alpha$ of $T = T_{2} + T_{3}$ , whose minimal polynomial is

$x^{18} - 82x^{16} - 6x^{15} + 2555x^{14} + 644x^{13} - 38859x^{12} - 18522x^{11} + 303416x^{10} + 219190x^{9} - 1141508x^{8} - 1122192x^{7} + 1595675x^{6} + 2088644x^{5} - 19344x^{4} - 694994x^{3} - 196545x^{2} + 3742x + 2203$

Atkin–Lehner signs

$p$	$w_p$
5	$+1$
139	$-1$

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
$\operatorname{tr} a_p$	−2	2	−18	5	5	17	1	19	−14	7	36	4	28	7	3	−52	17	18	22	19	38	−1	−13	30	96

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

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.226 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, 139, 695]: [0, 1, 12, 72] (certified at ell = 2147483137)
T = [(2, 1), (3, 1)]; h of degree 47 = 1 x 47 (phi(ord eps) x dim S_k^new); 5 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(695, 2)[3]   # 695.2.a.d

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

cargo run --release -p sagebrush-web --example atlas -- 695:2 1000