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**1. Homework Statement**

If [tex]\phi[/tex] is a usual field is it possible that

[tex]H\dot{\phi}=-\partial^2\phi/{\partial x^2}[/tex]

Where H is the hubble constant and the dot denotes time derivative

If [tex]\phi[/tex] is a usual field is it possible that

[tex]H\dot{\phi}=-\partial^2\phi/{\partial x^2}[/tex]

Where H is the hubble constant and the dot denotes time derivative

**2. Homework Equations**

[tex]H\dot{\phi}=-\partial^2\phi/{\partial x^2}[/tex]

[tex]H\dot{\phi}=-\partial^2\phi/{\partial x^2}[/tex]

**3. The Attempt at a Solution**

I tried different ways but am not able to find the particular expression for hubble constant used here.

I tried different ways but am not able to find the particular expression for hubble constant used here.

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