Lecture to the Washington-Baltimore Section of the Society for Industrial and Applied Mathematics Wednesday, November 9, 2005, 8:30 p.m. Johns Hopkins University, Homewood Campus, Baltimore Dr. Daniel W. Lozier Mathematical and Computational Sciences Division National Institute of Standards and Technology Gaithersburg, MD 20899-8910 MATH ON THE WEB AND THE DLMF PROJECT The Web has had a tremendous impact in many areas of modern life. An example is the ability to search for very detailed information, such as a place to buy parts for a home appliance and instructions for installing them. A corresponding impact in science is the ability to locate and print published papers as well as ephemera such as unpublished manuscripts, working papers, and supporting data. In mathematics we can look forward to a future in which specific formulas and theorems are located quickly and easily, and in which effective tools exist for incorporating them accurately and conveniently into papers and computer algebra systems. This talk will begin by surveying representative impacts that are beginning to emerge in mathematics, such as the World Digital Mathematics Library, and will continue by describing an ongoing series of conferences on Mathematical Knowledge Management. The work reported in these conferences is dedicated to developing the future outlined above. Then the talk will turn to a description of a large and complex project that is constructing a Digital Library of Mathematical Functions. The DLMF will include a free public Web site, maintained and disseminated by the National Institute of Standards and Technology. It will provide selected and validated properties of special functions together with advanced graphics and a search engine. The capabilities of the current Web site will be demonstrated. In addition to the Web site, a 1000-page printed handbook will be published and marketed commercially. The mathematical content and presentational style of the Web site and handbook is patterned after the widely used Handbook of Mathematical Functions, edited by Abramowitz and Stegun. The Web site is not just a copy of the handbook; it is a laboratory for research into the dynamic delivery of serious mathematics to advanced users. The goal is to provide unrestricted electronic access to an important body of mathematical knowledge, together with effective tools for utilizing the knowledge. The DLMF is being constructed under the leadership and with the financial support of the National Institute of Standards and Technology. External funding has been supplied by the National Science Foundation. Currently it is in the final stages of preparation for public release in 2006.