Atlas › Modular forms › Weight 2 › Level 1000 › 1000.2.a › 1000.2.a.c

Newform orbit 1000.2.a.c

Trace form

The 2 newforms in this orbit are conjugate over $\mathbb{Q}$ ; the sum of their $q$ -expansions is

$2q + q^{3} - 4q^{7} - 3q^{9} - 8q^{11} + 7q^{13} - 3q^{19} - 7q^{21} - 6q^{23} + O(q^{25})$

Coefficient field

The coefficients $a_n$ generate $\mathbb{Q}(\sqrt{5})$ . It is generated by the eigenvalue $\alpha$ of $T = T_{3} + 3T_{7}$ , whose minimal polynomial is

$x^{2} + 11x - 1$

Atkin–Lehner signs

$p$	$w_p$
2	— ( $2^2 \mid 1000$ )
5	— ( $5^2 \mid 1000$ )

For $p \parallel N$ every form in the orbit has $a_p = -p^{k/2-1} w_p$ .

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
$\operatorname{tr} a_p$	0	1	0	−4	−8	7	0	−3	−6	−16	−5	2	−6	−8	−3	13	−9	−5	−3	−4	19	−8	−4	−8	3

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

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.498 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, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 1000]: [0, 1, 2, 1, 3, 3, 6, 3, 10, 9, 18, 13, 34, 39, 78, 154] (certified at ell = 2147482801)
T = [(3, 1), (7, 3)]; h of degree 24 = 1 x 24 (phi(ord eps) x dim S_k^new); 4 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(1000, 2)[2]   # 1000.2.a.c

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

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