LONDON — Britain might be convulsed by Brexit, but the contemporary art world, and the 0.1 percent of the population that makes it go around, carries on as normal. At least, so it seems.

This week, thousands of international collectors, dealers and curators gathered here for the Frieze London and Frieze Masters fairs in Regent’s Park, as well as a dizzying array of dealer shows, auctions and other satellite events.

“Geopolitically, it may seem as though the world is going sideways, but the art market chugs ahead,” said Wendy Cromwell, an art adviser based in New York, in town for “Frieze Week.”

“Primary sales are alive and well, as is the secondary market for top quality, rare, in-demand work,” added Ms. Cromwell, referring to the “primary” market for new works from commercial galleries and the “secondary” trade in re-offered pieces, such as at auction.