Differential expression: Does it make sense?

[rollingstein]

I saw someone write this:

dW=Pd²V

I think this doesn't make any sense mathematically; but I wanted to check. Is this mathematically meaningful at all?

This I understand:

dW=PdV

W=∫PdV

But for dW=Pd²V I cannot see how one could proceed.

Here V is an independent variable; P=f(V).

 

[HallsofIvy]

No, that doesn't make sense. You cannot have a "first differential" equal to a "second differentrial.

 

[rollingstein]

No, that doesn't make sense. You cannot have a "first differential" equal to a "second differentrial.

Thanks.