Per Erik Rutger Martin-Löf (born 8 May 1942) is a Swedish logician, philosopher, and mathematical statistician. He is internationally renowned for his work on the foundations of probability, statistics, mathematical logic, and computer science - wikipedia 
Per Martin-Löf in 2004 -
- wikimedia.org
Since the late 1970s, Martin-Löf's publications have been mainly in logic. In philosophical logic, Martin-Löf has wrestled with the philosophy of logical consequence and judgment, partly inspired by the work of Brentano, Frege, and Husserl. In mathematical logic, Martin-Löf has been active in developing intuitionistic type theory as a constructive foundation of mathematics; Martin-Löf's work on type theory has influenced computer science.
Until his retirement in 2009, Per Martin-Löf held a joint chair for Mathematics and Philosophy at Stockholm University.
His brother Anders Martin-Löf is now emeritus professor of mathematical statistics at Stockholm University; the two brothers have collaborated in research in probability and statistics. The research of Anders and Per Martin-Löf has influenced statistical theory, especially concerning exponential families, the expectation-maximization method for missing data, and model selection.
Per Martin-Löf is an enthusiastic bird-watcher; his first scientific publication was on the mortality rates of ringed birds.
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# See also
- Franz Brentano - Rudolf Carnap - Michael Dummett - Gottlob Frege - Ulf Grenander - Jaakko Hintikka - Edmund Husserl - Andrei N. Kolmogorov - Anders Martin-Löf - John von Neumann - Peter Pagin - Dag Prawitz - Charles Sanders Peirce - Frank P. Ramsey - Bertrand Russell - Dana Scott - Alfred Tarski - Alan Turing