Speaker: Alexandra Kjuchukova (Notre Dame)
Title: Ribbon knots and Fox colored surfaces in B^4
When does a Fox p-colored knot in S^3 bound a Fox p-colored surface in B^4? I'll answer (a considerably more general version of) this question and explain how it arises in the study of the slice-ribbon problem, via a ribbon obstruction from the \Xi_p invariant of colored knots.