Hello!

Is there some way to calculate a total differential in sage? I'm thinking of something that in mathematica would be done like this:

In[1]:= f=x^2+y+Sin[z]

         2
Out[1]= x  + y + Sin[z]

In[2]:= Dt[f,m]

Out[2]= 2 x Dt[x, m] + Dt[y, m] + Cos[z] Dt[z, m]

In sage I get:

sage: var('x y z m')
sage: f=x^2+y+sin(z)
sage: diff(x,m)
0

My guess is there's no way to do this yet, but I also think It shouldn't be too hard to implement.

thanks!

Oscar

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