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@article{768505, author = {Polický, Zdeněk}, article_number = {4}, keywords = {compositum of quadratic fields; circular units; the index of circular units; class number}, language = {eng}, issn = {0022-314X}, journal = {Journal of Number Theory}, title = {On the index of circular units in the full group of units of a compositum of quadratic fields}, volume = {128/2008}, year = {2008} }
TY - JOUR ID - 768505 AU - Polický, Zdeněk PY - 2008 TI - On the index of circular units in the full group of units of a compositum of quadratic fields JF - Journal of Number Theory VL - 128/2008 IS - 4 SP - 1074-1090 EP - 1074-1090 SN - 0022314X KW - compositum of quadratic fields KW - circular units KW - the index of circular units KW - class number N2 - For a compositum of quadratic fields k = Q(pd1; : : : ;pds); where d1; : : : ; ds are square-free odd integers and d1 = 3 (mod 4); we study the group C of circular units of k: We construct a basis of C; compute the index of C in the full group of units of k and derive a lower bound for the divisibility of this index by a power of 2: These results give a lower bound for the divisibility of the class number of the maximal real subfield of k by a power of 2 ER -
POLICKÝ, Zdeněk. On the index of circular units in the full group of units of a compositum of quadratic fields. \textit{Journal of Number Theory}. 2008, roč.~128/2008, č.~4, s.~1074-1090. ISSN~0022-314X.
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