User blog comment:Bubby3/Letter notation extension to R and higher letters/@comment-25337554-20191120074744

> (b{int(c)}~b{frac(c)+1})[frac(c)] Do you mean (b{int(c)}~b{int(c)+1})[frac(c)]?

> If b < a[1] > If b > a[1] I think b is always greater then a, which is greater than a[1].