Properties

 Label 91.2.g.a Level $91$ Weight $2$ Character orbit 91.g Analytic conductor $0.727$ Analytic rank $1$ Dimension $2$ CM no Inner twists $2$

Related objects

Newspace parameters

 Level: $$N$$ $$=$$ $$91 = 7 \cdot 13$$ Weight: $$k$$ $$=$$ $$2$$ Character orbit: $$[\chi]$$ $$=$$ 91.g (of order $$3$$, degree $$2$$, minimal)

Newform invariants

 Self dual: no Analytic conductor: $$0.726638658394$$ Analytic rank: $$1$$ Dimension: $$2$$ Coefficient field: $$\Q(\sqrt{-3})$$ Defining polynomial: $$x^{2} - x + 1$$ Coefficient ring: $$\Z[a_1, a_2]$$ Coefficient ring index: $$1$$ Twist minimal: yes Sato-Tate group: $\mathrm{SU}(2)[C_{3}]$

$q$-expansion

Coefficients of the $$q$$-expansion are expressed in terms of a primitive root of unity $$\zeta_{6}$$. We also show the integral $$q$$-expansion of the trace form.

 $$f(q)$$ $$=$$ $$q -\zeta_{6} q^{2} -3 q^{3} + ( 1 - \zeta_{6} ) q^{4} + ( -3 + 3 \zeta_{6} ) q^{5} + 3 \zeta_{6} q^{6} + ( -3 + \zeta_{6} ) q^{7} -3 q^{8} + 6 q^{9} +O(q^{10})$$ $$q -\zeta_{6} q^{2} -3 q^{3} + ( 1 - \zeta_{6} ) q^{4} + ( -3 + 3 \zeta_{6} ) q^{5} + 3 \zeta_{6} q^{6} + ( -3 + \zeta_{6} ) q^{7} -3 q^{8} + 6 q^{9} + 3 q^{10} -3 q^{11} + ( -3 + 3 \zeta_{6} ) q^{12} + ( 1 - 4 \zeta_{6} ) q^{13} + ( 1 + 2 \zeta_{6} ) q^{14} + ( 9 - 9 \zeta_{6} ) q^{15} + \zeta_{6} q^{16} + ( 2 - 2 \zeta_{6} ) q^{17} -6 \zeta_{6} q^{18} - q^{19} + 3 \zeta_{6} q^{20} + ( 9 - 3 \zeta_{6} ) q^{21} + 3 \zeta_{6} q^{22} + 9 q^{24} -4 \zeta_{6} q^{25} + ( -4 + 3 \zeta_{6} ) q^{26} -9 q^{27} + ( -2 + 3 \zeta_{6} ) q^{28} + ( -7 + 7 \zeta_{6} ) q^{29} -9 q^{30} -3 \zeta_{6} q^{31} + ( -5 + 5 \zeta_{6} ) q^{32} + 9 q^{33} -2 q^{34} + ( 6 - 9 \zeta_{6} ) q^{35} + ( 6 - 6 \zeta_{6} ) q^{36} -2 \zeta_{6} q^{37} + \zeta_{6} q^{38} + ( -3 + 12 \zeta_{6} ) q^{39} + ( 9 - 9 \zeta_{6} ) q^{40} + ( -3 + 3 \zeta_{6} ) q^{41} + ( -3 - 6 \zeta_{6} ) q^{42} + 7 \zeta_{6} q^{43} + ( -3 + 3 \zeta_{6} ) q^{44} + ( -18 + 18 \zeta_{6} ) q^{45} + ( -1 + \zeta_{6} ) q^{47} -3 \zeta_{6} q^{48} + ( 8 - 5 \zeta_{6} ) q^{49} + ( -4 + 4 \zeta_{6} ) q^{50} + ( -6 + 6 \zeta_{6} ) q^{51} + ( -3 - \zeta_{6} ) q^{52} -3 \zeta_{6} q^{53} + 9 \zeta_{6} q^{54} + ( 9 - 9 \zeta_{6} ) q^{55} + ( 9 - 3 \zeta_{6} ) q^{56} + 3 q^{57} + 7 q^{58} + ( 4 - 4 \zeta_{6} ) q^{59} -9 \zeta_{6} q^{60} -13 q^{61} + ( -3 + 3 \zeta_{6} ) q^{62} + ( -18 + 6 \zeta_{6} ) q^{63} + 7 q^{64} + ( 9 + 3 \zeta_{6} ) q^{65} -9 \zeta_{6} q^{66} -3 q^{67} -2 \zeta_{6} q^{68} + ( -9 + 3 \zeta_{6} ) q^{70} -13 \zeta_{6} q^{71} -18 q^{72} + 13 \zeta_{6} q^{73} + ( -2 + 2 \zeta_{6} ) q^{74} + 12 \zeta_{6} q^{75} + ( -1 + \zeta_{6} ) q^{76} + ( 9 - 3 \zeta_{6} ) q^{77} + ( 12 - 9 \zeta_{6} ) q^{78} + ( 3 - 3 \zeta_{6} ) q^{79} -3 q^{80} + 9 q^{81} + 3 q^{82} + ( 6 - 9 \zeta_{6} ) q^{84} + 6 \zeta_{6} q^{85} + ( 7 - 7 \zeta_{6} ) q^{86} + ( 21 - 21 \zeta_{6} ) q^{87} + 9 q^{88} -6 \zeta_{6} q^{89} + 18 q^{90} + ( 1 + 9 \zeta_{6} ) q^{91} + 9 \zeta_{6} q^{93} + q^{94} + ( 3 - 3 \zeta_{6} ) q^{95} + ( 15 - 15 \zeta_{6} ) q^{96} + 5 \zeta_{6} q^{97} + ( -5 - 3 \zeta_{6} ) q^{98} -18 q^{99} +O(q^{100})$$ $$\operatorname{Tr}(f)(q)$$ $$=$$ $$2q - q^{2} - 6q^{3} + q^{4} - 3q^{5} + 3q^{6} - 5q^{7} - 6q^{8} + 12q^{9} + O(q^{10})$$ $$2q - q^{2} - 6q^{3} + q^{4} - 3q^{5} + 3q^{6} - 5q^{7} - 6q^{8} + 12q^{9} + 6q^{10} - 6q^{11} - 3q^{12} - 2q^{13} + 4q^{14} + 9q^{15} + q^{16} + 2q^{17} - 6q^{18} - 2q^{19} + 3q^{20} + 15q^{21} + 3q^{22} + 18q^{24} - 4q^{25} - 5q^{26} - 18q^{27} - q^{28} - 7q^{29} - 18q^{30} - 3q^{31} - 5q^{32} + 18q^{33} - 4q^{34} + 3q^{35} + 6q^{36} - 2q^{37} + q^{38} + 6q^{39} + 9q^{40} - 3q^{41} - 12q^{42} + 7q^{43} - 3q^{44} - 18q^{45} - q^{47} - 3q^{48} + 11q^{49} - 4q^{50} - 6q^{51} - 7q^{52} - 3q^{53} + 9q^{54} + 9q^{55} + 15q^{56} + 6q^{57} + 14q^{58} + 4q^{59} - 9q^{60} - 26q^{61} - 3q^{62} - 30q^{63} + 14q^{64} + 21q^{65} - 9q^{66} - 6q^{67} - 2q^{68} - 15q^{70} - 13q^{71} - 36q^{72} + 13q^{73} - 2q^{74} + 12q^{75} - q^{76} + 15q^{77} + 15q^{78} + 3q^{79} - 6q^{80} + 18q^{81} + 6q^{82} + 3q^{84} + 6q^{85} + 7q^{86} + 21q^{87} + 18q^{88} - 6q^{89} + 36q^{90} + 11q^{91} + 9q^{93} + 2q^{94} + 3q^{95} + 15q^{96} + 5q^{97} - 13q^{98} - 36q^{99} + O(q^{100})$$

Character values

We give the values of $$\chi$$ on generators for $$\left(\mathbb{Z}/91\mathbb{Z}\right)^\times$$.

 $$n$$ $$15$$ $$66$$ $$\chi(n)$$ $$-\zeta_{6}$$ $$-1 + \zeta_{6}$$

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 $$\iota_m(\nu)$$ $$a_{2}$$ $$a_{3}$$ $$a_{4}$$ $$a_{5}$$ $$a_{6}$$ $$a_{7}$$ $$a_{8}$$ $$a_{9}$$ $$a_{10}$$
9.1
 0.5 + 0.866025i 0.5 − 0.866025i
−0.500000 0.866025i −3.00000 0.500000 0.866025i −1.50000 + 2.59808i 1.50000 + 2.59808i −2.50000 + 0.866025i −3.00000 6.00000 3.00000
81.1 −0.500000 + 0.866025i −3.00000 0.500000 + 0.866025i −1.50000 2.59808i 1.50000 2.59808i −2.50000 0.866025i −3.00000 6.00000 3.00000
 $$n$$: 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
91.g even 3 1 inner

Twists

By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 91.2.g.a 2
3.b odd 2 1 819.2.n.c 2
7.b odd 2 1 637.2.g.a 2
7.c even 3 1 91.2.h.a yes 2
7.c even 3 1 637.2.f.b 2
7.d odd 6 1 637.2.f.a 2
7.d odd 6 1 637.2.h.a 2
13.c even 3 1 91.2.h.a yes 2
13.c even 3 1 1183.2.e.a 2
13.e even 6 1 1183.2.e.c 2
21.h odd 6 1 819.2.s.a 2
39.i odd 6 1 819.2.s.a 2
91.g even 3 1 inner 91.2.g.a 2
91.g even 3 1 8281.2.a.i 1
91.h even 3 1 637.2.f.b 2
91.h even 3 1 1183.2.e.a 2
91.k even 6 1 1183.2.e.c 2
91.m odd 6 1 637.2.g.a 2
91.m odd 6 1 8281.2.a.j 1
91.n odd 6 1 637.2.h.a 2
91.p odd 6 1 8281.2.a.g 1
91.u even 6 1 8281.2.a.c 1
91.v odd 6 1 637.2.f.a 2
273.bm odd 6 1 819.2.n.c 2

By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
91.2.g.a 2 1.a even 1 1 trivial
91.2.g.a 2 91.g even 3 1 inner
91.2.h.a yes 2 7.c even 3 1
91.2.h.a yes 2 13.c even 3 1
637.2.f.a 2 7.d odd 6 1
637.2.f.a 2 91.v odd 6 1
637.2.f.b 2 7.c even 3 1
637.2.f.b 2 91.h even 3 1
637.2.g.a 2 7.b odd 2 1
637.2.g.a 2 91.m odd 6 1
637.2.h.a 2 7.d odd 6 1
637.2.h.a 2 91.n odd 6 1
819.2.n.c 2 3.b odd 2 1
819.2.n.c 2 273.bm odd 6 1
819.2.s.a 2 21.h odd 6 1
819.2.s.a 2 39.i odd 6 1
1183.2.e.a 2 13.c even 3 1
1183.2.e.a 2 91.h even 3 1
1183.2.e.c 2 13.e even 6 1
1183.2.e.c 2 91.k even 6 1
8281.2.a.c 1 91.u even 6 1
8281.2.a.g 1 91.p odd 6 1
8281.2.a.i 1 91.g even 3 1
8281.2.a.j 1 91.m odd 6 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator $$T_{2}^{2} + T_{2} + 1$$ acting on $$S_{2}^{\mathrm{new}}(91, [\chi])$$.

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ $$1 + T + T^{2}$$
$3$ $$( 3 + T )^{2}$$
$5$ $$9 + 3 T + T^{2}$$
$7$ $$7 + 5 T + T^{2}$$
$11$ $$( 3 + T )^{2}$$
$13$ $$13 + 2 T + T^{2}$$
$17$ $$4 - 2 T + T^{2}$$
$19$ $$( 1 + T )^{2}$$
$23$ $$T^{2}$$
$29$ $$49 + 7 T + T^{2}$$
$31$ $$9 + 3 T + T^{2}$$
$37$ $$4 + 2 T + T^{2}$$
$41$ $$9 + 3 T + T^{2}$$
$43$ $$49 - 7 T + T^{2}$$
$47$ $$1 + T + T^{2}$$
$53$ $$9 + 3 T + T^{2}$$
$59$ $$16 - 4 T + T^{2}$$
$61$ $$( 13 + T )^{2}$$
$67$ $$( 3 + T )^{2}$$
$71$ $$169 + 13 T + T^{2}$$
$73$ $$169 - 13 T + T^{2}$$
$79$ $$9 - 3 T + T^{2}$$
$83$ $$T^{2}$$
$89$ $$36 + 6 T + T^{2}$$
$97$ $$25 - 5 T + T^{2}$$