Almost exactly 100 years ago, Max Dehn described an algorithm to determine whether two given cycles on a compact surface are homotopic, meaning one cycle can be continuously deformed into the other without leaving the surface. We describe a simple variant of Dehn’s algorithm that runs in linear time, with no hidden dependence on the genus of the surface. Specifically, given two closed vertex-ed...

Patterns of Shame in Some Australian Autobiographies, 1960 to 1995 This thesis argues that an understanding of the emotion of shame can contribute substantially to the literary interpretation of a broad range of Australian autobiographies published between 1960 and 1995. From a detailed analysis of more than a dozen autobiographical texts, I conclude that shame is also a powerful force within A...

A Midsummer Reminiscence In June of 1957 word came to me in Zurich that Dr. Fulton was gravely ill. He had recently arrived in London to celebrate the Harvey Tercen-tenary and was to go on from there to Oxford to receive an honorary degree. He had rallied from critical illnesses before, but this time it seemed that the end had come. I boarded a plane for London. The muffled roar of the all-but-...

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This paper celebrates a 25th birthday, a record of learning and teaching across the Commonwealth. It began in 1959, when Philip Evans (secretary, British Paediatric Association 1954-59) and Reginald Lightwood (Head of University Department of Paediatrics, St Mary's Medical School, London), convinced that paediatric teaching exchanges would improve child health within the Commonwealth, sought th...