更改

f}{\partial y}+z\frac{\partial f}{\partial z}+\cdots \equiv nf.

f}{\partial y}+z\frac{\partial f}{\partial z}+\cdots \equiv nf.

</math>

</math>

{{NumBlk|:|<math>x\frac{\partial f}{\partial x}+y\frac{\partial

如果<math>f (x, y, z, \ldots)</math>对<math>x, y, z, \ldots</math>是<math>n</math>次齐次的，则它满足欧拉定理：{{NumBlk|:|<math>x\frac{\partial f}{\partial x}+y\frac{\partial

f}{\partial y}+z\frac{\partial f}{\partial z}+\cdots \equiv nf.</math>|{{EquationRef|3}}}}

f}{\partial y}+z\frac{\partial f}{\partial z}+\cdots \equiv nf.</math>|{{EquationRef|3}}}}

In [[thermodynamics]], if the scale of a system is merely

In [[thermodynamics]], if the scale of a system is merely