Show commands: Magma / SageMath

Defining polynomial

Copy content comment:Define the p-adic field
 
Copy content sage:Prec = 100 # Default precision of 100 Q23 = Qp(23, Prec); x = polygen(QQ) L.<t> = Q23.extension(x^3 + 2*x + 18) K.<a> = L.extension(x^2 + 23*t)
 
Copy content magma:Prec := 100; // Default precision of 100 Q23 := pAdicField(23, Prec); K := LocalField(Q23, Polynomial(Q23, [324, 95, 4, 36, 4, 0, 1]));
 

$( x^{3} + 2 x + 18 )^{2} + 23 x$ Copy content Toggle raw display

Copy content comment:Defining polynomial
 
Copy content sage:K.defining_polynomial()
 
Copy content magma:DefiningPolynomial(K);
 

Invariants

Base field: $\Q_{23}$
Copy content comment:Base field Qp
 
Copy content sage:K.base()
 
Copy content magma:Q23;
 
Degree $d$: $6$
Copy content comment:Degree over Qp
 
Copy content sage:K.absolute_degree()
 
Copy content magma:Degree(K);
 
Ramification index $e$:$2$
Copy content comment:Ramification index
 
Copy content sage:K.absolute_e()
 
Copy content magma:RamificationIndex(K);
 
Residue field degree $f$:$3$
Copy content comment:Residue field degree (Inertia degree)
 
Copy content sage:K.absolute_f()
 
Copy content magma:InertiaDegree(K);
 
Discriminant exponent $c$:$3$
Copy content comment:Discriminant exponent
 
Copy content magma:Valuation(Discriminant(K));
 
Discriminant root field:$\Q_{23}(\sqrt{23})$
Root number: $i$
$\Aut(K/\Q_{23})$ $=$ $\Gal(K/\Q_{23})$: $C_6$
This field is Galois and abelian over $\Q_{23}.$
Visible Artin slopes:$[\ ]$
Visible Swan slopes:$[\ ]$
Means:$\langle\ \rangle$
Rams:$(\ )$
Jump set:undefined
Roots of unity:$12166 = (23^{ 3 } - 1)$
Copy content comment:Roots of unity
 
Copy content sage:len(K.roots_of_unity())
 

Intermediate fields

$\Q_{23}(\sqrt{23})$, 23.3.1.0a1.1

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

Canonical tower

Unramified subfield:23.3.1.0a1.1 $\cong \Q_{23}(t)$ where $t$ is a root of \( x^{3} + 2 x + 18 \) Copy content Toggle raw display
Copy content comment:Maximal unramified subextension
 
Copy content sage:K.maximal_unramified_subextension()
 
Relative Eisenstein polynomial: \( x^{2} + 23 t \) $\ \in\Q_{23}(t)[x]$ Copy content Toggle raw display

Ramification polygon

Residual polynomials:$z + 2$
Associated inertia:$1$
Indices of inseparability:$[0]$

Invariants of the Galois closure

Galois degree: $6$
Galois group: $C_6$ (as 6T1)
Inertia group: Intransitive group isomorphic to $C_2$
Wild inertia group: $C_1$
Galois unramified degree: $3$
Galois tame degree: $2$
Galois Artin slopes: $[\ ]$
Galois Swan slopes: $[\ ]$
Galois mean slope: $0.5$
Galois splitting model:not computed