On 2014-08-15, s meagher <[email protected]> wrote: > ------=_Part_362_1984219158.1408080922405 > Content-Type: text/plain; charset=UTF-8 > > Apologies if this is answered elsewhere in this group or in the > documentation, but I have not found the answer. > > When computing a galois group in sage using type='pari' Sage gives the > group a name. I have not been able to find a guide for the nomenclature > used. > > For example, names like S_3 and D(4) are fairly clear. But what is 2^3 S_3 > and 2^4 S_4 - I presume they are the wreath products (\Z/2)^n . S_n. > > Is there a reference? And am I right about 2^n S_n
Not sure if D(n) is so clear. Different communities denote the dihedral group of order 2n by D(n), resp. by D(2n). I guess the notation follows the notation from "Atlas of Finite Simple Groups" by Conway et al. Roughly the same is used by GAP. IIRC, PARI uses group IDs from a GAP database to give each group a unique ID. HTH, Dima -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
