scu.3.2.1.15.a
Base Field
\(F = \) 2.1.2.3a1.3 \( = \mathbb{Q}_{ 2 }(a) = \mathbb{Q}_{ 2 }[x] / (x^{2} + 7\cdot 2 )\)
View on LMFDB ↗
Description
supercuspidal unramified
Construction
\(
\tau = \chi \oplus \chi^{-1}
\), with the character \(\chi\) as below
Semistability defect
\( e = 3\)
Conductor exponent
\( v(N) = 2\)
Character Order
3
Inducing Field
The inertial type \(\tau\) is reducible, induced from a character of
\(K = F(b)\), with \(b\) a root of \(x^{2} + x + 1 \)
Underlying Character
Character \(\chi^A:\mathcal O_K^\times \to \mathbb C^\times\) with the following properties:
Order
3
Conductor exponent
1
Values on generators of
\((\mathcal{O}_K/\mathfrak p^{ 1 })^\times/U_{\mathfrak{p}^{ 1 } }\)
, with \(\zeta=\frac{-1+\sqrt{-3}}{2}\) a 3rd root of unity
:
\(\begin{array}{l}
\chi^A\left(b + 3a + 1 \right) &= \zeta^{ 1 }
\\
\chi^A\left(4b + 1 \right) &= \zeta^{ 0 }
\\
\chi^A\left(-6b + 4a + 5 \right) &= \zeta^{ 0 }
\end{array}
\)
Inertia Polynomial
The following polynomial defines a field \(L\) such that \(L^{un}\) is the fixed field of \(\tau\).
\( x^{6} + 3 x^{5} + 6 x^{4} + 7 x^{3} + 6 x^{2} + 3 x + 3 \)