You probably know by now that a differential
k-form
k ≥
1 on a domain
D ⊂ R
n is very similar to a vector field on
D, and hence a correspondence between the two may be established.
For instance, we may set a correspondence between the 1-form F
1 dx + F
2 dy + F
3 dz and the vector field
F = F
1 i + F
2 j + F
3 k.
Using this setup, find the vector differential identity corresponding to the fact

for any differential 0-form g on a domain
D in R
3.
◦ ∇
2(g) = 0
◦ ∇ ∙ (∇g) = 0
◦ ∇g =
0◦ ∇ × (∇g) =
0◦ (∇g)∙ ∇) = 0