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

What does the [tex]z[/tex] mean above?

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

What does the [tex]z[/tex] mean above?

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cristo

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It means "holding z constant".

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Ray Vickson

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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

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