Philip Higgins

Philip J. Higgins (born 1926) is a British mathematician, who has worked in areas of algebra and algebraic topology. He is well known for his book

- P. J. Higgins,
*Categories and groupoids*, Repr. Theory Appl. Categ., 1 – 178 (electronic), ISSN 1201-561X, reprint of the 1971 original*Notes on categories and groupoids*, (Van Nostrand Reinhold, London; MR0327946) with a new preface by the author.

and for his long standing collaboration with Ronnie Brown on nonabelian algebraic topology, see here.

His earlier paper

- P. J. Higgins,
*Algebras with a scheme of operators*, Math. Nachr. 27 (1963) 115–132.

has been influential: it deals with partial operations, following on from his paper

- P. J. Higgins,
*Groups with multiple operators*, Proc London Math. Soc. VI (1956) 366-416.

His paper

- P. J. Higgins,
*The fundamental groupoid of a graph of groups*, J. London Math. Soc. (2), 13 (1976) 145–149,

developed methods that were later on used by Haefliger in assigning a groupoid to a complex of groups.

Recently he worked with Kirill Mackenzie on Lie groupoids and Lie algebroids

category: people

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