Atlas › Modular forms › Weight 2 › Level 699 › 699.2.a › 699.2.a.c

Newform orbit 699.2.a.c

Trace form

The 5 newforms in this orbit are conjugate over $\mathbb{Q}$ ; the sum of their $q$ -expansions is

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

Coefficient field

The coefficients $a_n$ generate a number field of degree 5. It is generated by the eigenvalue $\alpha$ of $T = T_{2} + 3T_{5}$ , whose minimal polynomial is

$x^{5} + 29x^{4} + 294x^{3} + 1243x^{2} + 1897x + 163$

Atkin–Lehner signs

$p$	$w_p$
3	$-1$
233	$-1$

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
$\operatorname{tr} a_p$	−2	5	−9	−3	−10	−2	−8	−2	−17	−20	−1	−8	−10	4	−12	−16	−15	−12	15	−4	12	−6	−6	0	−1

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

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.242 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, 233, 699]: [0, 1, 20, 80] (certified at ell = 2147482481)
T = [(2, 1), (5, 3)]; h of degree 39 = 1 x 39 (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(699, 2)[2]   # 699.2.a.c

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

cargo run --release -p sagebrush-web --example atlas -- 699:2 1000