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The calculation algorithm of logarithmic derivative is brought in Logarithmic Derivative @model.

Note

In Well Testing applications the logarithmic derivative is often denoted as 

LaTeX Math Inline
bodyp' = t \, \frac{dp}{d t}
 which is misnomer as the usual mathematical convention for prime " ' " is the regular Derivative with respect to the argument
LaTeX Math Inline
bodyp' = \frac{dp}{d t}
.


Tip

In Well Testing applications the logarithmic derivative is often denoted as 

LaTeX Math Inline
bodyp' = t \, \frac{dp}{d t}
 which is misnomer as the usual mathematical convention for prime " ' " is the regular Derivative with respect to the argument
LaTeX Math Inline
bodyp' = \frac{dp}{d t}
.

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