Atlas › Modular forms › Weight 4 › Level 189 › 189.4.a › 189.4.a.c

Newform orbit 189.4.a.c

$q$ -expansion

$q - 8q^{4} + 21q^{5} + 7q^{7} - 21q^{11} + 2q^{13} + 64q^{16} - 42q^{17} + 119q^{19} - 168q^{20} + 147q^{23} + O(q^{25})$

Coefficient field

The coefficients $a_n$ generate $\mathbb{Q}$ . The eigenvalue of $T = T_{2} + 3T_{5}$ is a root of

$x - 63$

Atkin–Lehner signs

$p$	$w_p$
3	— ( $3^2 \mid 189$ )
7	$-1$

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	0	21	7	−21	2	−42	119	147	210	65	−97	−399	92	252	−672	−504	632	650	567	−448	−484	462	−1407	488

$\operatorname{tr} a_n$ 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 189, against the semicircle $\tfrac{2}{\pi}\sqrt{1 - x^2}$ :

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.154 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, 3, 7, 9, 21, 27, 63, 189]: [1, 2, 3, 4, 10, 10, 26, 74] (certified at ell = 2147483647)
T = [(2, 1), (5, 3)]; h of degree 24 = 1 x 24 (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(189, 4)[2]   # 189.4.a.c

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

cargo run --release -p sagebrush-web --example atlas -- 189:4 1000