what does this inversed triangle stand for?

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It is called nabla, which is the name of the symbol but not it's meaning.

In Calculus, you can find it (alone) as an operator meaning "denotes the vector of partial derivatives":

$$\nabla = \left(\frac{\partial}{\partial x},\ \frac{\partial}{\partial y},\ \frac{\partial}{\partial z}\right)$$

If you are in three dimensions.

In your case, the $x$ subscripts indicates the only $x$ component of the gradient:

$$\nabla_x = \frac{\partial}{\partial x}$$

More here what does ∇ (upside down triangle) symbol mean in this problem∇-upside-down-triangle-symbol-mean-in-this-problem?noredirect=1&lq=1

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Larry Baynes
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Larry Baynes

Updated on July 23, 2022

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  • Larry Baynes
    Larry Baynes over 1 year

    Can someone show me the meaning of this symbol? I've googled but couldn't find it

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