1. Is the total differential and is a Lepage equivalent of. 2. Up to a total differential ( exact form ). 3. Taking a surface of constant pressure ( dP = 0 ) the total differential becomes: 4. The total differential is then rigorously defined as 5. The total differentials of the functions are: 6. The total differential of the Gibbs free energy G \, in terms of its natural variables is 7. The result is the differential change \ operatorname df in, or total differential of, the function f. 8. A Legendre transformation is performed to change the variables in the total differential of the generalized coordinate space Lagrangian; 9. The sum of the partial differentials with respect to all of the independent variables is the "'total differential "' 10. In 1985 two six-pulse valve groups of thyristors were added to increase the voltage to 500 kV per pole for a total differential voltage of 1, 000 kV.
