In Ponemah v6.30, users may define frequency bins when using the HRV Frequency Domain as displayed in the screenshot below. 

Ponemah considers each of the frequency bin intervals as closed ended. For example, if we have two bins, the bins would be represented mathematically as:

[a,b] and [b,c]

The value b is a single point on the continuum.  The energy associated with the numeric value of b is effectively split between the two bins (VLF and LF), and is effectively zero as a single point in proportion to the span of the two adjacent finite intervals.