This obituary is part of a series about people who have died in the coronavirus pandemic. Read about others here.

John Horton Conway, the English-born Princeton mathematician whose body of work ranged from the rigorously highbrow to the frivolously fun, earning him prizes and a reputation as a creative, iconoclastic and even magical genius, died on Saturday in New Brunswick, N.J. He was 82.

His wife, Diana Conway, said his death, at a nursing home, was caused by Covid-19.

Dr. Conway’s boundless curiosity produced profound contributions to number theory, game theory, coding theory, group theory, knot theory, topology, probability theory, algebra, analysis, combinatorics and more. Foremost, he considered himself a classical geometer.

“His swath was probably broader than anyone who ever lived,” said the mathematician Neil Sloane, a collaborator with Dr. Conway and the founder of the On-Line Encyclopedia of Integer Sequences. “I’ve worked with a lot of people, and he was the fastest at solving a problem and would pursue a topic as far as it would go.” (The two were co-authors of 50 papers and published the 706-page book “Sphere Packings, Lattices and Groups.”)