How do we react to the missed appointment? It is a busy clinic (is there any other type?) and the first reaction is likely to be relief. Then there is the realisation that some thought may need to be applied to the child who was not brought. Then there is the remembrance that there is a policy to be followed. Perhaps, it would have been easier if the child had come to the clinic... There are a ...

Type IIB supergravity enjoys a discrete non-Abelian duality group, which has potential quantum anomalies. In this paper we explicitly compute these, and present the bordism group that controls them, modulo some physically motivated assumptions. Quite surprisingly, find they do not vanish, naively would signal an inconsistency of F-theory. Remarkably, subtle modification standard 10d Chern-Simon...