Thanks a lot, I'll have a look at that. On 15 juin, 14:26, Alastair Irving <alastair.irv...@sjc.ox.ac.uk> wrote: > On 14/06/2011 21:58, Jean-Pierre Flori wrote: > > > > > On 14 juin, 08:44, Simon King<simon.k...@uni-jena.de> wrote: > >> Since sage-nt seems to agree that it is a bug, I opened trac ticket > >> #11474. > > Good ! > > > About the original memleak, I tried looking at how > > EllipticCurves_finite_field (maybe not correct name) are created but > > could not find anything fishy, only Python code which should not > > produce any memleak. > > Hi > > I think this is a problem with multivariate polynomials over finite > fields and is not specific to elliptic curves. The following code > produces a leak: > > K=GF(2^50,"t") > R.<x,y>=PolynomialRing(K) > a=K.random_element() > while(1): > f=a*x > del f > > When constructing an elliptic curve its equation is constructed in the > 3-variable polynomial ring over K, and thus we will get this leak. > > Best wishes > > Alastair
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