Each collection of numbers should be able to mention simple transformations of the listed numbers that should be considered as in the collection as well. Examples:
For Taylor coefficients a_n we would also like to include a_n/n! automatically.
For zeros of the Riemann zeta function we want to include their conjugates automatically.
Each collection of numbers should be able to mention simple transformations of the listed numbers that should be considered as in the collection as well. Examples: