| 1. | Typically, the potential is modelled as a Heaviside step function.
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| 2. | We can define an integral of a step function against ? as
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| 3. | For example, the values of the step function that results from:
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| 4. | There are many other smooth, analytic approximations to the step function.
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| 5. | S is a step function, monotonically non-decreasing.
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| 6. | The relationship between retention and particles size is not a step function.
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| 7. | In the original Wagner model, the filter function is a step function
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| 8. | For instance, it is the distributional derivative of the Heaviside step function.
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| 9. | The family of all step functions evidently satisfies the above axioms for elementary functions.
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| 10. | Euclidean norm ) and \ Theta ( \ cdot ) the Heaviside step function.
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