lift of FFELT

[Xavier-François Roblot <roblot@math.univ-lyon1.fr>]

Hi guys,


at the moment, applying lift() to an FFELT results in doing nothing (cf. 
gen3.c:2877). I think it would more sensible to return the corresponding 
polynomial with coefficients lifted in Z. I know there are other ways to 
achieve this result but I believe that would be consistent with the use 
of lift() to go from INTMOD (which are also elements of a finite ring) 
to INT. BTW, ffgen for primitive finite fields does not work:

(12:48) gp > ffgen(ffinit(5,1), x)
  ***   at top-level: ffgen(ffinit(5,1),x)
  ***                 ^--------------------
  *** ffgen: bug in PARI/GP (Segmentation Fault), please report

so the only to get a generator of the multiplicative group is to use 
znprimroot which returns a INTMOD. Hence, the need to have one common 
function to deal with primitive and imprimitive cases at the same time.


Take care,

--
Xavier-François Roblot
Institut Camille Jordan
Université Lyon 1
21 avenue Claude Bernard
69622 Villeurbanne cedex
http://math.univ-lyon1.fr/~roblot