Pour K un corps de caractéristique 3 nous donnons explicitement la famille complète d'extensions de K à groupe de Galois et déterminons le discriminant d'une telle extension. Dans le cas où K est le corps de fractions d'un anneau de séries de puissances formelles en 3 variables, ce résultat est intéressant dans le contexte de la Conjecture Locale de Croisements Normaux d'Abhyankar.
For K a field of characteristic 3 we give explicitly the whole family of Galois extensions of K with Galois group and determine the discriminant of such an extension. In the case when K is the field of fractions of a formal power series ring in 3 variables, this result is interesting in the context of Abhyankar's Normal Crossings Local Conjecture.
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@article{CRMATH_2008__346_11-12_611_0, author = {Crespo, Teresa and Hajto, Zbigniew}, title = {Extensions with {Galois} group $ {2}^{+}{S}_{4}\ast {D}_{8}$ in characteristic 3}, journal = {Comptes Rendus. Math\'ematique}, pages = {611--614}, publisher = {Elsevier}, volume = {346}, number = {11-12}, year = {2008}, doi = {10.1016/j.crma.2008.04.010}, language = {en}, url = {http://www.numdam.org/articles/10.1016/j.crma.2008.04.010/} }
TY - JOUR AU - Crespo, Teresa AU - Hajto, Zbigniew TI - Extensions with Galois group $ {2}^{+}{S}_{4}\ast {D}_{8}$ in characteristic 3 JO - Comptes Rendus. Mathématique PY - 2008 SP - 611 EP - 614 VL - 346 IS - 11-12 PB - Elsevier UR - http://www.numdam.org/articles/10.1016/j.crma.2008.04.010/ DO - 10.1016/j.crma.2008.04.010 LA - en ID - CRMATH_2008__346_11-12_611_0 ER -
%0 Journal Article %A Crespo, Teresa %A Hajto, Zbigniew %T Extensions with Galois group $ {2}^{+}{S}_{4}\ast {D}_{8}$ in characteristic 3 %J Comptes Rendus. Mathématique %D 2008 %P 611-614 %V 346 %N 11-12 %I Elsevier %U http://www.numdam.org/articles/10.1016/j.crma.2008.04.010/ %R 10.1016/j.crma.2008.04.010 %G en %F CRMATH_2008__346_11-12_611_0
Crespo, Teresa; Hajto, Zbigniew. Extensions with Galois group $ {2}^{+}{S}_{4}\ast {D}_{8}$ in characteristic 3. Comptes Rendus. Mathématique, Tome 346 (2008) no. 11-12, pp. 611-614. doi : 10.1016/j.crma.2008.04.010. http://www.numdam.org/articles/10.1016/j.crma.2008.04.010/
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