Hi, Example: Maxwell Relation (thermoD)... ([itex]\frac{∂μ}{∂T}[/itex])[itex]_{p,n}[/itex] = - ([itex]\frac{∂S}{∂n}[/itex])[itex]_{T,p}[/itex] what does it mean having those subscript variables outside of the brackets. thanks
They are kept constant in the process. For example, the left side is the change of µ if you change T, but keep p and n constant.
post#2 of https://www.physicsforums.com/showthread.php?t=666011 gives an example of the use of this for deriving one of Maxwells relations Have you studied partial differentiation?