Properties

Label 199.1.2.1a1.1
Base \(\Q_{199}\)
Degree \(2\)
e \(2\)
f \(1\)
c \(1\)
Galois group $C_2$ (as 2T1)

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Defining polynomial

Copy content comment:Define the p-adic field
 
Copy content sage:Prec = 100 # Default precision of 100 Q199 = Qp(199, Prec); x = polygen(QQ) K.<a> = Q199.extension(x^2 + 199)
 
Copy content magma:Prec := 100; // Default precision of 100 Q199 := pAdicField(199, Prec); K := LocalField(Q199, Polynomial(Q199, [199, 0, 1]));
 

\(x^{2} + 199\) Copy content Toggle raw display

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

Invariants

Base field: $\Q_{199}$
Copy content comment:Base field Qp
 
Copy content sage:K.base()
 
Copy content magma:Q199;
 
Degree $d$: $2$
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 $f$:$1$
Copy content comment:Residue field degree (Inertia degree)
 
Copy content sage:K.absolute_f()
 
Copy content magma:InertiaDegree(K);
 
Discriminant exponent $c$:$1$
Copy content comment:Discriminant exponent
 
Copy content magma:Valuation(Discriminant(K));
 
Discriminant root field:$\Q_{199}(\sqrt{199\cdot 3})$
Root number: $i$
$\Aut(K/\Q_{199})$ $=$ $\Gal(K/\Q_{199})$: $C_2$
This field is Galois and abelian over $\Q_{199}.$
Visible Artin slopes:$[\ ]$
Visible Swan slopes:$[\ ]$
Means:$\langle\ \rangle$
Rams:$(\ )$
Jump set:undefined
Roots of unity:$198 = (199 - 1)$
Copy content comment:Roots of unity
 
Copy content sage:len(K.roots_of_unity())
 

Intermediate fields

The extension is primitive: there are no intermediate fields between this field and $\Q_{ 199 }$.

Canonical tower

Unramified subfield:$\Q_{199}$
Copy content comment:Maximal unramified subextension
 
Copy content sage:K.maximal_unramified_subextension()
 
Relative Eisenstein polynomial: \( x^{2} + 199 \) 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: $2$
Galois group: $C_2$ (as 2T1)
Inertia group: $C_2$ (as 2T1)
Wild inertia group: $C_1$
Galois unramified degree: $1$
Galois tame degree: $2$
Galois Artin slopes: $[\ ]$
Galois Swan slopes: $[\ ]$
Galois mean slope: $0.5$
Galois splitting model:$x^{2} + 398$