text: greatest integer function? greatest integer function is defined that [1.2] = 1 and so on.... what if we extend the idea to multiples of 1 - something like saying [101.89] = 100. based on this idea, is it possible for us to define something like  [x]100  (100 in the sub script) when we talk about multiples of 100 or  [x]1  when we talk about the usual greatest integer function.  my question is  - what is the dis-advantage in such a notation'? if one thinks of the graphs of your [[x]]100 and the usual [[x]], one realizes, from normal transformation rules, that your [[x]]100 is actually 100*[[x/100]].  so the disadvantage would simply be that there's another simple way to denote it.