Tribute provided by his son, Mark Bullen.

Peter Southcott Bullen was born on January 19, 1928 in Portsmouth, England to Alice and Stanley Bullen, an artificer in the Royal Navy. In 1937, when Peter was nine, the family moved to Malta after his father was posted to the British naval base there. With the outbreak of the second world war in 1939, Malta came under intense bombardment and in 1942 the family (which now included Peter’s brother Paul) was evacuated via Alexandria, Egypt to Durban, South Africa.

Having graduated from high school in Malta, Peter continued his education in South Africa, earning a BSc honours and MSc. In 1946 he got his first job teaching Mathematics at Howard College (Natal University College) in Durban. He returned to England to study at Cambridge University (Fitzwilliam College) where he earned a PhD in Mathematics in 1955. While in England he met and married Rachel (Ray) Rodgers in 1952. Their first two children, Paul and Mark, were born in Durban.

In 1956 Peter and his new family moved to Vancouver to take a position as a lecturer in the Mathematics department at the University of British Columbia. Two more children were born in 1957 (Guy) and 1961 (Leah).

After retirement in 1993 he continued to pursue his passion for mathematics, teaching as a visiting professor at several universities around the world, contributing to a number of publications and, most recently, writing the book Calculus Made Difficult which was published in 2022.

On October 28, 2024, at the age of 96, Peter died of heart failure in Vancouver, Canada