Introduction Positivity 13 (2009), 1–2 c 2009 Birkh¨ auser Verlag Basel/Switzerland 1385-1292/010001-2 Positivity DOI 10.1007/s11117-008-9003-5 Anthony W. Wickstead The fifth Positivity conference held at Queen’s University, Belfast during the week 23rd to 27th July 2007 marked a significant growth in attendance at this series of events. From a respectable total of 44 participants at Positivity IV in Dresden, numbers jumped to 71 in Belfast with a total of 20 countries being represented. The breadth of interests represented also showed a substantial increase, showing that participation is increasingly by those who want to use the methods developed by the Positivity community and not just by that community itself. That breadth is reflected in these proceedings. To a large extent, the instructional workshop that took place during the weekend preceding the conference seems to have been responsible for the increase in attendance. Apart from the speakers, 31 people attended the workshop. Those people ranged from some just starting out on a PhD to well-established researchers in Positivity, other areas of Mathematics and in Economics. This was well beyond the range of interest that I expected. I would particularly like to thank Roko Aliprantis, Karim Boulabiar, Gerard Buskes, Ben de Pagter and Anton Positivity Springer Journals


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Copyright © 2009 by Birkhäuser Verlag Basel/Switzerland
Mathematics; Fourier Analysis; Operator Theory; Potential Theory; Calculus of Variations and Optimal Control; Optimization; Econometrics
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