987654321 / 123456789

The ratio 987654321 / 123456789 is very nearly 8. What about the analogous ratio in other bases?

John D. Cook | Applied Mathematics Consulting
Special function diagram

A diagram showing how various mathematical special functions relate to each other

John D. Cook | Applied Mathematics Consulting

Differential Privacy

Comparing Truncation to Differential PrivacyTraditional methods of data de-identification obscure datavalues. For
example, you might truncate a date to just the year.
Differential privacy obscures queryvalues by injecting enough noise
to keep from revealing information on an individual.
Let’s compare two approaches for de-identifying a person’s age:
truncation and differential privacy.
TruncationFirst consider truncating birth date to year. For example, anyone born
between January 1, 1955 and December 31, 1955 would be recorded as being https://social.isurf.ca/display/c443a55c-115c-dcd9-4d8e-874840592875

Differential Privacy

John D Cook (unofficial) 2019-05-15 22:15:11 » *Comparing Truncation to Differential Privacy* Traditional methods of data de-identification obscure data...