Atlas › Modular forms › Weight 2 › Level 607 › 607.2.a › 607.2.a.b

Newform orbit 607.2.a.b

Trace form

The 7 newforms in this orbit are conjugate over $\mathbb{Q}$ ; the sum of their $q$ -expansions is

$7q - 4q^{2} - 5q^{3} + 8q^{4} + q^{5} - 5q^{7} - 15q^{8} + 4q^{9} - 4q^{10} - q^{11} - 9q^{12} - 15q^{13} + 7q^{14} - 3q^{15} + 6q^{16} - 20q^{17} - 14q^{18} - 10q^{20} + 2q^{21} + 21q^{22} - 9q^{23} + 27q^{24} + O(q^{25})$

Coefficient field

The coefficients $a_n$ generate a number field of degree 7. It is generated by the eigenvalue $\alpha$ of $T = T_{2} + T_{3}$ , whose minimal polynomial is

$x^{7} + 9x^{6} + 17x^{5} - 24x^{4} - 41x^{3} + 53x^{2} - 13x - 1$

Atkin–Lehner signs

$p$	$w_p$
607	$+1$

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
$\operatorname{tr} a_p$	−4	−5	1	−5	−1	−15	−20	0	−9	−17	19	−7	28	−19	−22	−7	12	−13	2	−37	−11	−16	24	−47	−9

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

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.21 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, 607]: [0, 51] (certified at ell = 2147480989)
T = [(2, 1), (3, 1)]; h of degree 50 = 1 x 50 (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(607, 2)[1]   # 607.2.a.b

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

cargo run --release -p sagebrush-web --example atlas -- 607:2 1000