# Properties

 Label 1728.2.f.c Level $1728$ Weight $2$ Character orbit 1728.f Analytic conductor $13.798$ Analytic rank $0$ Dimension $4$ CM discriminant -3 Inner twists $8$

# Related objects

## Newspace parameters

 Level: $$N$$ $$=$$ $$1728 = 2^{6} \cdot 3^{3}$$ Weight: $$k$$ $$=$$ $$2$$ Character orbit: $$[\chi]$$ $$=$$ 1728.f (of order $$2$$, degree $$1$$, minimal)

## Newform invariants

 Self dual: no Analytic conductor: $$13.7981494693$$ Analytic rank: $$0$$ Dimension: $$4$$ Coefficient field: $$\Q(\zeta_{12})$$ Defining polynomial: $$x^{4} - x^{2} + 1$$ Coefficient ring: $$\Z[a_1, \ldots, a_{31}]$$ Coefficient ring index: $$2^{2}$$ Twist minimal: yes Sato-Tate group: $\mathrm{U}(1)[D_{2}]$

## $q$-expansion

Coefficients of the $$q$$-expansion are expressed in terms of a primitive root of unity $$\zeta_{12}$$. We also show the integral $$q$$-expansion of the trace form.

 $$f(q)$$ $$=$$ $$q + 5 \zeta_{12}^{3} q^{7} +O(q^{10})$$ $$q + 5 \zeta_{12}^{3} q^{7} + ( -1 + 2 \zeta_{12}^{2} ) q^{13} + ( -10 \zeta_{12} + 5 \zeta_{12}^{3} ) q^{19} -5 q^{25} + 4 \zeta_{12}^{3} q^{31} + ( 7 - 14 \zeta_{12}^{2} ) q^{37} + ( 12 \zeta_{12} - 6 \zeta_{12}^{3} ) q^{43} -18 q^{49} + ( 5 - 10 \zeta_{12}^{2} ) q^{61} + ( -14 \zeta_{12} + 7 \zeta_{12}^{3} ) q^{67} -17 q^{73} + 13 \zeta_{12}^{3} q^{79} + ( -10 \zeta_{12} + 5 \zeta_{12}^{3} ) q^{91} + 5 q^{97} +O(q^{100})$$ $$\operatorname{Tr}(f)(q)$$ $$=$$ $$4q + O(q^{10})$$ $$4q - 20q^{25} - 72q^{49} - 68q^{73} + 20q^{97} + O(q^{100})$$

## Character values

We give the values of $$\chi$$ on generators for $$\left(\mathbb{Z}/1728\mathbb{Z}\right)^\times$$.

 $$n$$ $$325$$ $$703$$ $$1217$$ $$\chi(n)$$ $$-1$$ $$-1$$ $$-1$$

## Embeddings

For each embedding $$\iota_m$$ of the coefficient field, the values $$\iota_m(a_n)$$ are shown below.

For more information on an embedded modular form you can click on its label.

Label $$\iota_m(\nu)$$ $$a_{2}$$ $$a_{3}$$ $$a_{4}$$ $$a_{5}$$ $$a_{6}$$ $$a_{7}$$ $$a_{8}$$ $$a_{9}$$ $$a_{10}$$
863.1
 0.866025 − 0.500000i −0.866025 − 0.500000i −0.866025 + 0.500000i 0.866025 + 0.500000i
0 0 0 0 0 5.00000i 0 0 0
863.2 0 0 0 0 0 5.00000i 0 0 0
863.3 0 0 0 0 0 5.00000i 0 0 0
863.4 0 0 0 0 0 5.00000i 0 0 0
 $$n$$: e.g. 2-40 or 990-1000 Significant digits: Format: Complex embeddings Normalized embeddings Satake parameters Satake angles

## Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
3.b odd 2 1 CM by $$\Q(\sqrt{-3})$$
4.b odd 2 1 inner
8.b even 2 1 inner
8.d odd 2 1 inner
12.b even 2 1 inner
24.f even 2 1 inner
24.h odd 2 1 inner

## Twists

By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 1728.2.f.c 4
3.b odd 2 1 CM 1728.2.f.c 4
4.b odd 2 1 inner 1728.2.f.c 4
8.b even 2 1 inner 1728.2.f.c 4
8.d odd 2 1 inner 1728.2.f.c 4
12.b even 2 1 inner 1728.2.f.c 4
24.f even 2 1 inner 1728.2.f.c 4
24.h odd 2 1 inner 1728.2.f.c 4

By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
1728.2.f.c 4 1.a even 1 1 trivial
1728.2.f.c 4 3.b odd 2 1 CM
1728.2.f.c 4 4.b odd 2 1 inner
1728.2.f.c 4 8.b even 2 1 inner
1728.2.f.c 4 8.d odd 2 1 inner
1728.2.f.c 4 12.b even 2 1 inner
1728.2.f.c 4 24.f even 2 1 inner
1728.2.f.c 4 24.h odd 2 1 inner

## Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on $$S_{2}^{\mathrm{new}}(1728, [\chi])$$:

 $$T_{5}$$ $$T_{7}^{2} + 25$$ $$T_{23}$$

## Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ $$T^{4}$$
$3$ $$T^{4}$$
$5$ $$T^{4}$$
$7$ $$( 25 + T^{2} )^{2}$$
$11$ $$T^{4}$$
$13$ $$( 3 + T^{2} )^{2}$$
$17$ $$T^{4}$$
$19$ $$( -75 + T^{2} )^{2}$$
$23$ $$T^{4}$$
$29$ $$T^{4}$$
$31$ $$( 16 + T^{2} )^{2}$$
$37$ $$( 147 + T^{2} )^{2}$$
$41$ $$T^{4}$$
$43$ $$( -108 + T^{2} )^{2}$$
$47$ $$T^{4}$$
$53$ $$T^{4}$$
$59$ $$T^{4}$$
$61$ $$( 75 + T^{2} )^{2}$$
$67$ $$( -147 + T^{2} )^{2}$$
$71$ $$T^{4}$$
$73$ $$( 17 + T )^{4}$$
$79$ $$( 169 + T^{2} )^{2}$$
$83$ $$T^{4}$$
$89$ $$T^{4}$$
$97$ $$( -5 + T )^{4}$$