Partial Differentiation [Subscript]

HJ1Y3Rpb24gLSBDb21wdXRlZCB3aXRoIGEgcmVndWxhciBwYXJ0aWFsIGRpZmZlcmVyaWFuaW5nIG1lYW4/IEZvciBleGFtcGxlOgpUaGlzIG1lYW5zIHwgaG9saWRpbmcgem1vbiBhZHZhbmNl?In summary, the subscript outside a partial differentiation in the notation (\frac{\partial x}{\partial y})_z indicates that we are considering x to be a function of y and z, without using notation
  • #1
Air
203
0
What does the subscript outside a partial differentiation mean? For example:

[tex]\left(\frac{\partial x}{\partial y}\right)_z[/tex]

What does the [tex]z[/tex] mean above?
 
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  • #2
It means "holding z constant".
 
  • #3
Is that any different from a regular partial derivative though? I've started to encounter the notation in literature and am finding it strange.
 
  • #4
Amos Axiom said:
Is that any different from a regular partial derivative though? I've started to encounter the notation in literature and am finding it strange.

It is rarely used in Mathematics, but is used often in some fields such as Thermodynamics. Basically, it indicates that we are considering x to be a function of y and z, without using notation like x(y,z).

RGV
 

What is partial differentiation?

Partial differentiation is a mathematical concept used in multivariable calculus to find the rate of change of a function with respect to one of its variables while holding all other variables constant.

Why is partial differentiation important?

Partial differentiation is important because it allows us to analyze how a function changes due to one specific variable while keeping all other variables constant. This is crucial in many scientific fields, such as physics, economics, and engineering.

What is the notation used for partial differentiation?

The notation used for partial differentiation is similar to regular differentiation, but with a subscript to indicate which variable is being held constant. For example, ∂f/∂x means the partial derivative of f with respect to x.

What is the difference between partial differentiation and total differentiation?

Partial differentiation only considers the rate of change of a function with respect to one variable, while total differentiation takes into account the rate of change with respect to all variables. Partial differentiation is used when analyzing functions with multiple variables, while total differentiation is used for functions with a single variable.

Can partial differentiation be applied to any function?

Partial differentiation can be applied to any function that has multiple variables. However, the function must be continuous and differentiable at the point of interest in order for partial derivatives to exist.

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