$p$-adic field 2.1.16.58c1.842

• Label: 2.1.16.58c1.842
• Base: \(\Q_{2}\)
• Degree: \(16\)
• e: \(16\)
• f: \(1\)
• c: \(58\)
• Galois group: $(C_2^2\times C_4^2):D_8$ (as 16T1276)

Defining polynomial

\(x^{16} + 4 x^{14} + 8 x^{13} + 2 x^{12} + 8 x^{11} + 24 x^{10} + 16 x^{5} + 2\)

Invariants

Base field:	$\Q_{2}$
Degree $d$:	$16$
Ramification index $e$:	$16$
Residue field degree $f$:	$1$
Discriminant exponent $c$:	$58$
Discriminant root field:	$\Q_{2}$
Root number:	$1$
$\Aut(K/\Q_{2})$:	$C_2$
This field is not Galois over $\Q_{2}.$
Visible Artin slopes:	$[2, 2, \frac{15}{4}, \frac{37}{8}]$
Visible Swan slopes:	$[1,1,\frac{11}{4},\frac{29}{8}]$
Means:	$\langle\frac{1}{2}, \frac{3}{4}, \frac{7}{4}, \frac{43}{16}\rangle$
Rams:	$(1, 1, 8, 15)$
Jump set:	$[1, 3, 11, 27, 43]$
Roots of unity:	$4 = 2^{ 2 }$

Intermediate fields

$\Q_{2}(\sqrt{-1})$, 2.1.4.6a1.1, 2.1.8.21a1.9

Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.

Canonical tower

Unramified subfield:	$\Q_{2}$
Relative Eisenstein polynomial:	\( x^{16} + 4 x^{14} + 8 x^{13} + 2 x^{12} + 8 x^{11} + 24 x^{10} + 16 x^{5} + 2 \)

Ramification polygon

Residual polynomials:	$z^{12} + 1$,$z^2 + 1$,$z + 1$
Associated inertia:	$2$,$1$,$1$
Indices of inseparability:	$[43, 28, 12, 12, 0]$

Invariants of the Galois closure

Galois degree:	$1024$
Galois group:	$(C_2^2\times C_4^2):D_8$ (as 16T1276)
Inertia group:	$C_2^5:D_8$ (as 16T1002)
Wild inertia group:	not computed
Galois unramified degree:	$2$
Galois tame degree:	$1$
Galois Artin slopes:	$[2, 2, 3, \frac{7}{2}, \frac{7}{2}, \frac{15}{4}, \frac{9}{2}, \frac{9}{2}, \frac{37}{8}]$
Galois Swan slopes:	$[1,1,2,\frac{5}{2},\frac{5}{2},\frac{11}{4},\frac{7}{2},\frac{7}{2},\frac{29}{8}]$
Galois mean slope:	$4.43359375$
Galois splitting model:	$x^{16} + 30 x^{12} - 300 x^{10} + 3400 x^{8} - 10000 x^{6} + 16250 x^{4} - 12500 x^{2} + 15625$