## Density d of a binary bitstring :

- the number of 1s bits divided by the total number of bits (1s and 0s)

## Using the TI for a set of bitsrings

- if d too high Þ similarity is high between the bitstrings Þ too many hits signaled (false positives )
- if d too low Þ similarity is low between the bitstrings Þ few hits signaled (false negatives )

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