ex.24.7.2.54_74_123.d
Base Field
\(F = \) 2.2.1.0a1.1 \( = \mathbb{Q}_{ 2 }(a) = \mathbb{Q}_{ 2 }[x] / (x^{2} + x + 1 )\)
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Description
exceptional, SL(2,3)
Construction
Extension to \(I_F\) of \(
\tau = \operatorname{Ind}^{I_K}_{I_L} \chi
\), with \(L, K\) and \(\chi\) as below
Semistability defect
\( e = 24\)
Conductor exponent
\( v(N) = 7\)
Character Order
4
Triply Field
The inertial type \(\tau\) becomes an induction (triply imprimitive) over:
\( L = F(b) \), \(b\) a root of \(x^{3} + (-a - 1)\cdot 2 \)
Inducing Field
The inertial type \(\tau\) becomes reducible over
\(K = L(c)\), \(c\) a root of \(x^{2} - a\cdot b^{3} x + (-b^{2} + (2a + 2)b - a + 1)b \)
Underlying Character
Character \(\chi^A:\mathcal O_K^\times \to \mathbb C^\times\) with the following properties:
Order
4
Conductor exponent
11
Values on generators of
\((\mathcal{O}_K/\mathfrak p^{ 11 })^\times/U_{\mathfrak{p}^{ 11 } }\)
:
\(\begin{array}{l}
\chi^A\left((-a + 4)c + 3a - 1 \right) &= i^{ 1 }
\\
\chi^A\left(2a\cdot b^{2}c + 1 \right) &= i^{ 0 }
\\
\chi^A\left((2b^{2} + (3a + 3)b - 3a + 1)c + (3a + 1)b + a + 1 \right) &= i^{ 0 }
\\
\chi^A\left((3b^{2} + 4)c + 1 \right) &= i^{ 3 }
\\
\chi^A\left((2a\cdot b^{2} + (3a + 2)b - 2a + 4)c + 2a\cdot b + 4a + 1 \right) &= i^{ 0 }
\\
\chi^A\left(((a + 3)b^{2} + (3a + 3)b + 2a)\cdot c + (a + 1)b^{2} + (3a + 3)b + 3a - 3 \right) &= i^{ 2 }
\\
\chi^A\left((a\cdot b^{2} + (3a + 2)b - a + 4)c + (3a + 1)b^{2} + (3a + 3)b + a + 2 \right) &= i^{ 2 }
\\
\chi^A\left(((3a + 3)b^{2} + (4a + 4))c + 1 \right) &= i^{ 0 }
\end{array}
\)
Inertia Polynomial
The following polynomial defines a field \(L\) such that \(L^{un}\) is the fixed field of \(\tau\).
\( x^{24} + 4a x^{21} + 8a x^{12} + 4a x^{6} + 8 x^{3} + 2a + 2 \)