Atlas › Modular forms › Weight 2 › Level 97 › 97.2.a › 97.2.a.b

Newform orbit 97.2.a.b

Trace form

The 4 newforms in this orbit are conjugate over $\mathbb{Q}$ ; the sum of their $q$ -expansions is

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

Coefficient field

The coefficients $a_n$ generate a number field of degree 4. It is generated by the eigenvalue $\alpha$ of $T = T_{2} + T_{3}$ , whose minimal polynomial is

$x^{4} - 3x^{3} - 5x^{2} + 20x - 11$

Atkin–Lehner signs

$p$	$w_p$
97	$-1$

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
$\operatorname{tr} a_p$	3	0	1	3	5	−6	3	−3	22	7	−4	−6	3	9	19	−4	1	−7	−11	11	−19	−16	14	−26	4

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

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.16 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, 97]: [0, 8] (certified at ell = 2147483137)
T = [(2, 1), (3, 1)]; h of degree 7 = 1 x 7 (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(97, 2)[1]   # 97.2.a.b

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

cargo run --release -p sagebrush-web --example atlas -- 97:2 1000