| 1. | This variable X is a scalar function of position in spacetime.
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| 2. | A scalar function called the electric potential can help.
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| 3. | This is a Poisson equation for the scalar function \, \ phi.
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| 4. | It can be used to calculate directional derivatives of scalar functions or normal directions.
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| 5. | Acting on scalar functions to produce scalar functions.
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| 6. | Acting on scalar functions to produce scalar functions.
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| 7. | If is a twice-differentiable scalar function, its expansion in a Taylor series is
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| 8. | This extends the directional derivative of scalar functions to sections of vector bundles or principal bundles.
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| 9. | For a laboratory plasma ? is a constant and ? is a scalar function of spatial coordinates.
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| 10. | Now there's no question about the second term, which is purely a scalar function.
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