Does the error you get look as follows?
TypeError: Error executing code in GP:
CODE:
sage[16385]=ellj(sage[16384]);
PARI/GP ERROR:
*** at top-level: sage[16384]=0.0010000000
*** ^--------------------
*** _[_]: not a vector.
This was supposed to be fixed by #15446, but apparently the fix was not
perfect. You can try using the PARI library interface instead, which is
both faster and more robust:
sage: pari.set_real_precision(500)
sage: v = []
sage: C = ComplexField(500)
sage: for i in range(1,1e4):
....: a = C((i*I+1)/1000)
....: v.append(pari(a).ellj())
Peter
Op donderdag 19 juni 2014 20:46:41 UTC+1 schreef Hao Chen:
>
> I was trying to compute j-invariants of list of points in the
> upper half plane using pari in sagemathcloud,
> when I noticed that it crashes as long as the list gets long.
> Specifically,
> the following code...
>
> %default_mode gp
> \p 500
> %default_mode sage
> v = []
> C = ComplexField(500)
> for i in range(1,1e4):
> a = C((i*I+1)/1000)
> v.append(gp.ellj(a))
>
> ...generates a 'PARI\GP interpreter crashed ...' error. Any ideas? Thanks!
>
>
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