University of Calgary
UofC Navigation


Submitted by 21232f297a57a5a... on Tue, 06/04/2013 - 5:07pm

Mathematical Genius . WWII Codebreaker . Pioneer of Computing . Gay Icon

Alan Mathison Turing, OBE, FRS, often called the "father of computer science", was a British mathematician and pioneer of computing.  Turing is best known for his work in a number of scientific fields: he solved the Decision Problem in mathematical logic, invented the standard model of computability now called the Turing Machine, and he made seminal contributions to cryptanalysis (code breaking), to computer architecture, to the philosophy of computation and artificial intelligence, and to mathematical biology.

During WWII, Turing's work at Britain's top-secret Code and Cypher School at Bletchley Park, was instrumental in breaking the German Enigma code, which helped end the war.  For his services, which remained secret throught his life, he was awarded the OBE in 1945. Turing applied his experience with electronic code-breaking machines at Bletchley Park in his post-war work on some of the very first electronic stored-program computers ever built. 

Turing was openly gay at a time when homosexuality was criminalized.  His prosecution and conviction in 1952 for "gross indecency" led to the loss of his security clearance.  Turing chose chemical castration instead of imprisonment as his sentence, and died in 1954 of an apparent suicide.

Turing was born on June 23, 1912.  The Departments of Computer Science and Philosophy, with support from the Faculties of Arts and Science and the Pacific Institute for the Mathematical Sciences, mark Turing's centenary with a series of events throughout 2012.  The lectures will be aimed at a general audience and are open to the public.  You can watch previous talks on mathtube.

Later in the year, Telus Spark will also host some events related to Turing as part of their Adults Only Thursday night series and the Calgary Science Café.


Turing and Intelligent Machines

Date & Time:
December 4, 2012 | 4:00 pm - 5:30 pm

Nicole Wyatt (University of Calgary)

ICT 121

December 4 PosterTuring's interest in the possibility of machine intelligence is probably most familiar in the form of the 'Turing Test', a version of which has been instantiated since 1991 as the Loebner Prize in Artificial Intelligence. To this date the Loebner Gold Medal has not been won. But should any future winner of the prize count themselves as having created a computer that thinks? Turing's 1950 Mind paper 'Computing Machinery and Intelligence', gives a sustained defence of the claim that a machine able to pass the test, which Turing called the Imitation Game, would indeed qualify as thinking. This lecture will explain the Turing Test as well as Turing's more general views concerning the prospects for artificial intelligence and examine both the criticisms of the test and Turing's rebuttals.

Watch the video online at

Alan Turing, the Politics of Sexual Science, and the Making of a Gay Icon

Date & Time:
November 6, 2012 | 4:00 pm - 5:30 pm

Chris Waters (Williams College)

ICT 121

In the 1940s Alan Turing’s homosexuality was an open secret amongst his co-workers at Bletchley Park. In 1952 the secret became widely known when Turing was arrested on charges of “gross indecency” under the same 1885 law that had led to the imprisonment of Oscar Wilde over half a century earlier. Opting for chemical “treatment” of his “condition” rather than imprisonment, Turing was one of many well-known casualties of a heightened drive against homosexuality in a postwar Britain that drew the line between the normal and the deviant more sharply than ever before. In his talk, Chris Waters will discuss Turing’s sexual proclivities and their meanings in the context of his times, focusing in particular on his arrest and subsequent fate in the context of the sexual politics of the first half of the 1950s. In addition, he will discuss the shaping of Turing’s posthumous reputation, beginning with the attempts made by the Gay Liberation Front in the 1970s to render Turing the gay icon he has become today.

Watch the video online at

Alan Turing and the Patterns of Life

Date & Time:
October 9, 2012 | 4:00 pm - 5:30 pm

Przemysław Prusinkiewicz (University of Calgary)

ICT 121

In 1952, Turing published his only paper spanning chemistry and biology: "The chemical basis of morphogenesis". In it, he proposed a hypothetical mechanism for the emergence of complex patterns in chemical reactions, called reaction-diffusion. He also predicted the use of computational models as a tool for understanding patterning. Sixty years later, reaction-diffusion is a key concept in the study of patterns and forms in nature. In particular, it provides a link between molecular genetics and developmental biology. The presentation will review the concept of reaction-diffusion, the tumultuous path towards its acceptance, and its current place in biology.

Watch the video online at

Alan Turing and Enigma

Date & Time:
March 27, 2012 | 4:00 pm - 5:30 pm

John R. Ferris (University of Calgary)

ENA 201

Central to Alan Turing's posthumous reputation is his work with British codebreaking during the Second World War. This relationship is not well understood, largely because it stands on the intersection of two technical fields, mathematics and cryptology, the second of which also has been shrouded by secrecy. This lecture will assess this relationship from an historical cryptological perspective. It treats the mathematization and mechanization of cryptology between 1920-50 as international phenomena. It assesses Turing's  role in one important phase of this process, British work at Bletchley Park in developing cryptanalytical machines for use against Enigma in 1940-41. It focuses on also his interest in and work with cryptographic machines between 1942-46, and concludes that work with them served as a seed bed for the development of his thinking about computers.

Watch the video online at

Breaking the Code

Date & Time:
March 14, 2012 | 5:30 pm - 7:00 pm

Written by Hugh Whitemore
Directed by Herbert Wise

CHC 119

Sir Derek Jacobi stars in this 1996 BBC production of Hugh Whitemore's 1986 biographical play. Alan Turing broke the German Enigma code and ultimately helped win WWII, and his theoretical work on computing machines now underpins computer science. His private life was complicated by his truthfulness and openness about his homosexuality at a time when it was illegal. The film paints a moving portrait of Turing's genius and momentous contributions,as well as his struggles with a repressive British society complicated by his involvement with national security.

Open to University of Calgary faculty and students only

Turing's Real Machines

Date & Time:
February 28, 2012 | 4:00 pm - 5:30 pm

Michael R. Williams (University of Calgary)

ENA 201

While Turing is best known for his abstract concept of a "Turing Machine," he did design (but not build) several other machines - particularly ones involved with code breaking and early computers. While Turing was a fine mathematician, he could not be trusted to actually try and construct the machines he designed - he would almost always break some delicate piece of equipment if he tried to do anything practical.

The early code-breaking machines (known as "bombes" - the Polish word for bomb, because of their loud ticking noise) were not designed by Turing but he had a hand in several later machines known as "Robinsons" and eventually the Colossus machines.

After the War he worked on an electronic computer design for the National Physical Laboratory - an innovative design unlike the other computing machines being considered at the time. He left the NPL before the machine was operational but made other contributions to early computers such as those being constructed at Manchester University.

This talk will describe some of his ideas behind these machines.

Watch the video online on mathtube

Alan Turing and the Decision Problem

Date & Time:
January 24, 2012 | 4:00 pm - 5:30 pm

Richard Zach (University of Calgary)

ICT 122 aka Lecture Theatre Four (between ICT and ENA)

Many scientific questions are considered solved to the best possible degree when we have a method for computing a solution.  This is especially true in mathematics and those areas of science in which phenomena can be described mathematically: one only has to think of the methods of symbolic algebra in order to solve equations, or laws of physics which allow one to calculate unknown quantities from known measurements.  The crowning achievement of mathematics would thus be a systematic way to compute the solution to any mathematical problem.  The hope that this was possible was perhaps first articulated by the 18th century mathematician-philosopher G. W. Leibniz. Advances in the foundations of mathematics in the early 20th century made it possible in the 1920s to first formulate the question of whether there is such a systematic way to find a solution to every mathematical problem. This became known as the decision problem, and it was considered a major open problem in the 1920s and 1930s.  Alan Turing solved it in his first, groundbreaking paper "On computable numbers" (1936).  In order to show that there cannot be a systematic computational procedure that solves every mathematical question, Turing had to provide a convincing analysis of what a computational procedure is. His abstract, mathematical model of computability is that of a Turing Machine. He showed that no Turing machine, and hence no computational procedure at all, could solve the Entscheidungsproblem.

Watch the video on mathtube