Atlas › Modular forms › Weight 2 › Level 454 › 454.2.a › 454.2.a.c

Newform orbit 454.2.a.c

Trace form

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

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

Coefficient field

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

$x^{5} - 2x^{4} - 26x^{3} + 60x^{2} + 33x - 19$

Atkin–Lehner signs

$p$	$w_p$
2	$+1$
227	$-1$

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
$\operatorname{tr} a_p$	−5	−1	3	−6	7	3	8	1	6	31	−4	7	22	−9	12	21	0	3	−19	−6	−18	−12	−11	−2	−32

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

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.29 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, 2, 227, 454]: [0, 1, 20, 59] (certified at ell = 2147479573)
T = [(3, 1), (5, 1)]; h of degree 18 = 1 x 18 (phi(ord eps) x dim S_k^new); 2 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(454, 2)[2]   # 454.2.a.c

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

cargo run --release -p sagebrush-web --example atlas -- 454:2 1000