Atlas › Modular forms › Weight 2 › Level 835 › 835.2.a › 835.2.a.b

Newform orbit 835.2.a.b

Trace form

The 11 newforms in this orbit are conjugate over $\mathbb{Q}$ ; the sum of their $q$ -expansions is

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

Coefficient field

The coefficients $a_n$ generate a number field of degree 11. It is generated by the eigenvalue $\alpha$ of $T = T_{2} + T_{3}$ , whose minimal polynomial is

$x^{11} - 5x^{10} - 24x^{9} + 113x^{8} + 227x^{7} - 809x^{6} - 977x^{5} + 1857x^{4} + 1085x^{3} - 1658x^{2} - 40x + 248$

Atkin–Lehner signs

$p$	$w_p$
5	$+1$
167	$-1$

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	3	−11	1	2	12	21	−7	16	18	−6	10	17	3	18	46	30	−6	−9	12	11	−12	30	5	−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 0.247 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, 167, 835]: [0, 1, 15, 86] (certified at ell = 2147483237)
T = [(2, 1), (3, 1)]; h of degree 55 = 1 x 55 (phi(ord eps) x dim S_k^new); 6 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(835, 2)[1]   # 835.2.a.b

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

cargo run --release -p sagebrush-web --example atlas -- 835:2 1000