Is the word formulæ, written with an æ at the end, valid in English? I stumbled upon this apparently plural form of formula in the Wiktionary. I had no idea the letter æ could occur in English. Does ...
Typesetting that goes beyond the scope of basic MS Word (e.g. LaTeX, or even modern Word versions with a good OpenType font) often uses ligatures for certain glyph combinations, the most common being ...