Introducing an upper threshold to filter undesirable and unstable
concepts.
The program reads the threshold as an interger holding the stability
threshold. Since the stability index is a fraction of one, it's real
form can be represented by an integer holding the fraction part. The
number of digits in the threshold indicate the precision of threshold
and can be adjusted as needed. The precision of threshold will also be
used to provide the precision of the stability returned by the program.
For example, if the threshold contains 3 digits intuitivily the user
also requires a stability index expressed with 3 digits. As soon as the
program detects that the stability of the concept is below threshold the
exploration stops and no valid stability is returned. If, in the other
hand, the stability is found to be above threshold, an approximation
will be provided according to the precision indicated.