The Dynamical Systems program in the Directorate of Engineering and the Applied Mathematics Program in the directorate of Mathematical and Physical Sciences Sciences, of the National Science Foundation, have just published a joint "Dear Colleague Letter", expressing interest in special topics in Dynamical Systems.  The letter encourages unsolicited proposals on the following topics:

• Fundamentals of complex systems
• Model reduction
• Long-term behavior
• Infinite-dimensional systems
• Discrete dynamical systems
• Uncertainty