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*From*: Diego Saravia <dsa@unsa.edu.ar>*Date*: Sat, 21 Jun 2014 20:17:32 -0300

Given that the pressure (P) is a scalar field, dP

is the /gradient/ of P. dP is equivalent to ∇P.

ok, now I understand what are you speaking about: Grad P

or Grad V

if you have V(T,P) that gradient ( vector) will be (partial V/Partial

T, partial V/partial P)

in another coordinates V(S,U) the same vector will be (partial

V/Partial S, partial V/partial U)

the same for P and all scalars in the "thermodynamic space" of a limp

sistem with constant mass, one phase, and variable volume and internal

energy.

This kind of systems ussually have two dimensions, and all that

vectors hace two dimensions.

**References**:**[Phys-L] notation for partial derivatives***From:*Carl Mungan <mungan@usna.edu>

**Re: [Phys-L] notation for partial derivatives***From:*John Denker <jsd@av8n.com>

**Re: [Phys-L] notation for partial derivatives***From:*Diego Saravia <dsa@unsa.edu.ar>

**Re: [Phys-L] notation for partial derivatives***From:*John Denker <jsd@av8n.com>

**Re: [Phys-L] notation for partial derivatives***From:*Diego Saravia <dsa@unsa.edu.ar>

**Re: [Phys-L] notation for partial derivatives***From:*John Denker <jsd@av8n.com>

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