Please contribute to this on-line knowledge base. It is intended to provide a baseline set of information for coping with numerals and mathematical notation (both Greek and Roman), particularly as found on inscriptions. Completeness is a function of contribution, so please share your knowledge (credit will be given where credit is due). And thanks!
This page was started in reaction to a discussion on Epigraph-L, the epigraphy list, in which the forms of the Greek numerals represented by digamma and sampi were at issue.