I dunno about that; [a,b) is frequently used to represent the left-closed interval, and what it is an interval over depends on the context. In topology, for exa

I dunno about that; [a,b) is frequently used to represent the left-closed interval, and what it is an interval over depends on the context. In topology, for example: open intervals over N are commonly written (a,b), but that actually means [a+1, b-1]. You could just as easily write it as [a+1,b) and everyone would already know what you mean.