Conferences, workshops, and related events (including seasonal schools and international travel by groups) support research and training activities of the mathematical sciences community. Proposals for conferences, workshops, or conference-like activities may request funding of any amount and for durations of up to three years. Proposals must be submitted to the appropriate DMS programs in accordance with the lead-time requirements specified on the program webpage. Funding: $200,000 to $4 million for 10-100 awards.
http://www.nsf.gov/funding/pgm_-summ. jsp? Pims _id=11701