I forward the message below from Klaas Landsman. ============================================================== I have a vacancy for a PhD student on the project "Topos theory, noncommutative geometry, and quantum logic", starting at a negotiable date in 2009. A detailed description of the project is available at <http://www.math.ru.nl/~landsman/NWOVC2008.pdf <http://www.math.ru.nl/%7Elandsman/NWOVC2008.pdf>>. The position is for four years (with an initial one-year appointment subject to extension to four years on satisfactory performance), and is financed by NWO. PhD positions in the Netherlands carry a decent salary (going up from about 2000 euro per month gross initially to about 3000 euro in the final year), and the local group of PhD students in mathematics and mathematical physics is exceptionally nice. Moreover, the mathematical physics group at Nijmegen is embedded in the GQT-cluster (see <www.gqt.nl <http://www.gqt.nl>>), officially called "The Fellowship of Geometry and Quantum Theory." Relevant to this project, among its other members are Ieke Moerdijk and Gunther Cornelissen. Applications are welcomed by May 15, 2009, using snail mail (accompanied by a very brief email to <landsman@math.ru.nl> <mailto:landsman@math.ru.nl> to announce your application) to Prof.dr. N.P. Landsman, Radboud Universiteit Nijmegen, Faculty of Science, IMAPP, Heyendaalseweg 135, 6525 AJ NIJMEGEN, THE NETHERLANDS. Please include a letter of motivation, a copy or draft of of your M.Sc. Thesis, a list of courses (including marks), and the names and email addresses of two or three senior academics who could provide information about yourself. Please do not ask them to send references yourself. Female mathematicians or theoretical physicists (with a strong background in mathematics) are especially encouraged to apply.