A workshop entitled “Karatekin Math Days: Combinatorics, Algebra, Geometry and Interactions” will be held in Cankiri/TURKEY on June 20-24, 2011. There will be four mini courses, several invited talks, a limited number of contributed talks and a poster session. For more information, see the workshop’s web page: http://matematik.karatekin.edu.tr/KMD2011.html.