The last thing I do ( but I am not sure it's "legal" :
f(x,y) = cos(x)-2*sin(y)
gradient = derivative( f )
nab=var("nabla",latex_name=r'\mathcal{\nabla}')
nabla=gradient;show(f);show(nab,nabla)
---------------------
∇(x,y) ↦ (−sin(x),−2cos(y))
Le lundi 20 août 2018 08:48:11 UTC+2, HG a écrit :
>
> hi,
>
> I would like to use nabla as div or grad operator, in sagemanifolds it's
> used as levita-civita, how could it be use as them if it's possible ?
>
> Regards
>
> Henri
>
>
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