3 ms·
In what you have written, V is not a function, but a value calculated from some other values, so it does not make sense to differentiate it. If you instead writ
by xigoi 3y ago
In what you have written, V is not a function, but a value calculated from some other values, so it does not make sense to differentiate it. If you instead write:
V : ℝ³ → ℝ
V(t,x,y) = (1 + sin(t))/sqrt(x^2+y^2)
then it’s clear what D_2(V) means.
- archgoon 3y ago[dead]
- enriquto 3y ago> not a function, but a value calculated from some other values The term of art is "an expression" [0]. And you can also differentiate expressions with respect to their variables. It's a perfectly supported construction in all symbolic computer algebra packages. No need to assign an (arbitrary) ordering to your variables in order to differentiate with respect to them. [0] https://en.wikipedia.org/wiki/Expression_(mathematics) https://en.wikipedia.org/wiki/Expression_(mathematics)