The notation follows Mazur and Ullom, Galois module structure of units in real biquadratic number fields, Acta Arithmetica 111.2 (2004) [10.4064/aa111-2-1, MR:2039416]. There are four basic types, I-IV, which describe the structure of the units $U$ modulo roots of unity. The subtype describes the actual structure of the units. Type I (i) means that there is a generating set for $U/\{\pm 1\}$ consisting of fundamental units of the quadratic subfields.
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- Last edited by David Roberts on 2019-05-03 17:22:09
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- 2019-05-03 17:22:09 by David Roberts (Reviewed)
- 2019-05-03 17:21:29 by David Roberts
- 2019-05-03 17:19:35 by David Roberts
- 2014-09-04 13:46:11 by John Jones