Atlas › Modular forms › Weight 2 › Level 696 › 696.2.a

Newspace 696.2.a: $S_{2}^{\mathrm{new}}(\Gamma_0(696))$

Newforms

Label	Dim	Coefficient field	Trace form	AL signs	Elliptic curve
696.2.a.a	1	$\mathbb{Q}$	$q - q^{3} - 2q^{5} + 3q^{7} + O(q^{8})$	+ −	696f1 rank 1
696.2.a.b	1	$\mathbb{Q}$	$q - q^{3} - q^{7} + O(q^{8})$	+ +	696a1 rank 1
696.2.a.c	1	$\mathbb{Q}$	$q - q^{3} + q^{5} - 3q^{7} + O(q^{8})$	+ +	696d1 rank 0
696.2.a.d	1	$\mathbb{Q}$	$q - q^{3} + 4q^{5} + 3q^{7} + O(q^{8})$	+ +	696e1 rank 0
696.2.a.e	1	$\mathbb{Q}$	$q + q^{3} - 3q^{5} + q^{7} + O(q^{8})$	− +	696b1 rank 0
696.2.a.f	1	$\mathbb{Q}$	$q + q^{3} - 2q^{5} - q^{7} + O(q^{8})$	− +	696g1 rank 1
696.2.a.g	1	$\mathbb{Q}$	$q + q^{3} - 5q^{7} + O(q^{8})$	− −	696c1 rank 1
696.2.a.h	2	$\mathbb{Q}(\sqrt{17})$	$2q - 2q^{3} - 3q^{5} + O(q^{8})$	+ −
696.2.a.i	2	$\mathbb{Q}(\sqrt{41})$	$2q + 2q^{3} + 4q^{5} + 3q^{7} + O(q^{8})$	− +
696.2.a.j	3	degree 3	$3q + 3q^{3} + q^{5} + 4q^{7} + O(q^{8})$	− −

Hecke characteristic polynomials

The eigenvalue of $T = T_{5} + 3T_{7} + 5T_{11} + 7T_{13} + 9T_{17} + 11T_{19}$ generates each orbit's coefficient field; on the newspace its characteristic polynomial factors over $\mathbb{Q}$ as one irreducible factor per orbit:

Orbit	Characteristic polynomial of $T$
696.2.a.a	$x + 52$
696.2.a.b	$x + 20$
696.2.a.c	$x - 110$
696.2.a.d	$x + 28$
696.2.a.e	$x - 158$
696.2.a.f	$x + 108$
696.2.a.g	$x + 104$
696.2.a.h	$x^{2} - 42x + 424$
696.2.a.i	$x^{2} + 10x - 6904$
696.2.a.j	$x^{3} - 100x^{2} - 924x + 22336$

Dimensions

Newforms $S_{2}^{\mathrm{new}}(\Gamma_0(696))$	14
Old forms	99
Cusp forms $S_{2}(\Gamma_0(696))$	113
Eisenstein series $E_{2}(\Gamma_0(696))$	15
Modular forms $M_{2}(\Gamma_0(696))$	128

Decomposition of the old subspace

$S_{2}^{\mathrm{old}}(\Gamma_0(696)) =$ $S_{2}^{\mathrm{new}}(\Gamma_0(24))^{\oplus 2}$ $\oplus$ $S_{2}^{\mathrm{new}}(\Gamma_0(29))^{\oplus 8}$ $\oplus$ $S_{2}^{\mathrm{new}}(\Gamma_0(58))^{\oplus 6}$ $\oplus$ $S_{2}^{\mathrm{new}}(\Gamma_0(87))^{\oplus 4}$ $\oplus$ $S_{2}^{\mathrm{new}}(\Gamma_0(116))^{\oplus 4}$ $\oplus$ $S_{2}^{\mathrm{new}}(\Gamma_0(174))^{\oplus 3}$ $\oplus$ $S_{2}^{\mathrm{new}}(\Gamma_0(232))^{\oplus 2}$ $\oplus$ $S_{2}^{\mathrm{new}}(\Gamma_0(348))^{\oplus 2}$

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.706 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, 3, 4, 6, 8, 12, 24, 29, 58, 87, 116, 174, 232, 348, 696]: [0, 1, 1, 2, 3, 3, 5, 8, 3, 9, 12, 18, 34, 34, 66, 128] (certified at ell = 2147483549)
T = [(5, 1), (7, 3), (11, 5), (13, 7), (17, 9), (19, 11)]; h of degree 14 = 1 x 14 (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(696, 2)

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

cargo run --release -p sagebrush-web --example atlas -- 696:2 1000

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