Apparently, this user prefers to keep an air of mystery about them.
20 What's the difference between \tolerance and \badness ? may 27 '11
18 Why use the control sequences \bigl, \biggl, \bigr or \biggr, as I can always use \big or \bigg? may 30 '11
18 Knuth's line breaking algorithm may 27 '11
10 What do these OpenType Font Math Table terms mean? may 31 '11
6 Why does MS Word's algorithm for vertical positioning of super- and subscripts not conform to TeX's ? jun 11 '11
6 Exercise 6.5 Knuth's TeXbook may 27 '11