Atlas › Modular forms › Weight 4 › Level 236 › 236.4.a › 236.4.a.a

Newform orbit 236.4.a.a

$q$ -expansion

$q + 2q^{3} + 2q^{5} - 3q^{7} - 23q^{9} - 59q^{11} - 33q^{13} + 4q^{15} + 47q^{17} + 40q^{19} - 6q^{21} - 40q^{23} + O(q^{25})$

Coefficient field

The coefficients $a_n$ generate $\mathbb{Q}$ . The eigenvalue of $T = T_{3} + T_{5}$ is a root of

$x - 4$

Atkin–Lehner signs

$p$	$w_p$
2	— ( $2^2 \mid 236$ )
59	$+1$

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	2	2	−3	−59	−33	47	40	−40	−4	−124	−157	221	291	−526	132	−59	82	−524	−15	538	947	−575	546	−34

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

Sato–Tate

The normalized $a_p / 2p^{3/2}$ for the primes $p < 1000$ not dividing 236, against the semicircle $\tfrac{2}{\pi}\sqrt{1 - x^2}$ :

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.139 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 engine's checks

dim M^+ at levels [1, 2, 4, 59, 118, 236]: [1, 2, 3, 16, 47, 93] (certified at ell = 2147482481)
T = [(3, 1), (5, 1)]; h of degree 15 = 1 x 15 (phi(ord eps) x dim S_k^new); 3 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(236, 4)[0]   # 236.4.a.a

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

cargo run --release -p sagebrush-web --example atlas -- 236:4 1000