Re: [sage-support] Re: nabla (levi-civita tensor of g)

2018-08-29 Thread Henri Girard
I added nab=var("nabla",latex_name=r'\mathcal{\nabla f}') ∇f(x,y)↦(−sin(x),−2cos(y)) Le 29/08/2018 à 18:46, HG a écrit : 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;s

[sage-support] Re: nabla (levi-civita tensor of g)

2018-08-29 Thread HG
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 :

Re: [sage-support] Re: nabla (levi-civita tensor of g)

2018-08-21 Thread Henri Girard
Le 21/08/2018 à 23:22, slelievre a écrit : Mon 2018-08-20 06:48:11 UTC, HG: > > 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 ? Can you give an example of what you would like to input and what

[sage-support] Re: nabla (levi-civita tensor of g)

2018-08-21 Thread slelievre
Mon 2018-08-20 06:48:11 UTC, HG: > > 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 ? Can you give an example of what you would like to input and what you would like the output to be? -- You recei