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IRL_ABooklet

Ireland algebra

Problem

Let be the fractional part function, defined by , where is the greatest integer less than or equal to . For instance, and . Let be defined by . Find 2023 distinct rational numbers satisfying . Each such solution should be explicitly written in the form for some integers .
Solution
The fractional part of a number is characterised by The equation , i.e. , is therefore equivalent to If is a rational number, this is equivalent to If we choose , then the 2023 integers that satisfy give an that fulfils the desired condition.
Final answer
x = m/2023 for m = 0, 1, ..., 2022

Techniques

Existential quantifiersFloors and ceilings