Targets 2007

The complex quadratic base field K with discriminant d = -50739

This example has neither been investigated by Brink [1]
nor in our previous paper [2].

We give the complete data needed to determine the capitulation type and the group G=Gal(K2|K).
Computed on July 31, 2007, at the University of Graz, Computer Centre [3,4].

Counter, n = 78 Discriminant, d = -50739 3-class group of type (3,3) 3-class number, h = 9 Conductor, f = 1
The non-Galois absolute cubic subfields (L1,L2,L3,L4) of the four unramified cyclic cubic relative extensions N|K
Regulators, R 18.0 21.5 24.7 29.8
Class numbers, h 3 3 3 3
Polynomials, p(X) = X3 + C*X + D, with d(p) = i2*d
(C,D) (48,-23) (-204,-1129) (-42,167) (-186,-985)
Indices, i 3 3 3 3
Fundamental units, e = (U + V*x + W*x2)/T, with P(x) = 0
U 134 -345974 -219811 -75804979
V -518 -18319 109904 -4682296
W 497 2380 17330 602102
T 3 1 3 3
Splitting primes, q 127 43 823 61
Associated quadratic forms, F = a*X2 + b*X*Y + c*Y2
(a,b,c) (105,-51,127) (43,1,295) (55,31,235) (61,47,217)
Represented primes, q 127 43 823 61
Associated ideal cubes, (x + y*d1/2)/2, with 4*q3 = x2 - d*y2
(x,y) (2389,7) (517,1) (41623,99) (310,4)
Principalization 3 1 4 4
Capitulation type D.10: (3,1,4,4) Group G in CBF1a(4,5) Contents


References:

[1] James R. Brink,
The class field tower for imaginary quadratic number fields of type (3,3),
Dissertation, Ohio State Univ., 1984.

[2] Daniel C. Mayer,
Principalization in Unramified Cyclic Cubic Extensions
of all Quadratic Fields with Discriminant -50000 < d < 0
and 3-Class Group of Type (3,3)
,
Univ. Graz, Computer Centre, 2003

[3] Daniel C. Mayer,
Two-Stage Towers of 3-Class Fields over Quadratic Fields,
(Latest Update)
Univ. Graz, 2008.

[4] Daniel C. Mayer,
3-Capitulation over Quadratic Fields
with Discriminant |d| < 106 and 3-Class Group of Type (3,3)
,
(Latest Update)
Univ. Graz, Computer Centre, 2008.

Navigation Center
Back to Algebra