XSLP_DELTA_ZERO
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     Description
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     Absolute zero acceptance tolerance used when calculating derivatives
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     Type
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     Double
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     Default value
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     -1.0 (not applied)
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     Notes
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     Provides an override value for the XSLP_DELTA_Z behavior. Derivatives smaller than XSLP_DELTA_ZERO will not be substituted by XSLP_DELTA_Z, defining a range in which derivatives are deemed nonzero and are affected by XSLP_DELTA_Z.
      A negative value means that this tolerance will not be applied. | 
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     Affects routines
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     See also
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