1. The problem statement, all variables and given/known data Is the function f(x)=x-floor function monotonous? For which intervals does it increase/decrease? 2. Relevant equations 3. The attempt at a solution Since for every x and y, x-floor function (x) is not necessarily greater/smaller than y-floor function (y), the function cannot be monotonous. For instance, x=3.5 and y=2.8. 0.5 < 0.8. On the other hand, when x=3.9 and y=2.8 0.9 > 0.8. What about increasing/decreasing intervals? Are there none?