Mathmaster

• mathētēs (μαθητης): (Greek) pupil → contest between a pupil and his master?

• m-m-master: master said with a stutter → in FW HCE's stutter is always a sign of his guilt

• MacMaster ?

• mathmaster → to overcome by means of logic, reason and strategy? → to outwit? (Joyce's coinage)

• mathematics ?

• still out to mathmaster → Adaline Glasheen discerns an allusion to Dublin's patron saint Laurence O'Toole (his surname in "still") and London's Thomas à Becket (his first name in to mathmaster)
• Third Census of Finnegans Wake