Brian Hartley (15 May 1939 – 8 October 1994) was a British mathematician specialising in group theory.
[3][4][1] Hartley's PhD thesis was completed in 1964 at the University of Cambridge under Philip Hall's supervision.
One recurrent theme appearing in his work was the relationship between the structure of groups and their subgroups consisting of elements fixed by particular automorphisms.
Hartley is perhaps best known by undergraduates for his book Rings, Modules and Linear Algebra, with Trevor Hawkes.
[5] Hartley was a keen hill walker, and it was while descending Helvellyn in the English Lake District that he collapsed with a heart attack and died.