February 2018 Table of Contents
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ISSN 0002-9920 (print) ISSN 1088-9477 (online) of the American Mathematical Society February 2018 Volume 65, Number 2 In Honor of Black History page 118 Proof of a Null Geometry Penrose Conjecture page 156 Nashville Meeting page 220 Portland Meeting page 224 Boston Meeting page 229 A MERICAN M ATHEMATICAL S OCIETY Support AMS Mathematics Research Communities 2016 MRC participants at work. Photo by Mike Breen Your gift builds strong research networks, assists early- career mathematicians, and helps mathematics advance. Mathematics Research Communities (MRCs) develop cohorts for collaborative research among early-career mathematicians through summer conferences, special sessions at meetings, discussion networks, and more. The AMS is grateful for the partial funding support from the National Science Foundation and for the generosity of individual donors who extend the reach and impact of the MRCs. To donate visit www.ams.org/support-mrc Contact the AMS Development Offi ce by phone: 401-455-4111 or email: [email protected] Notices of the American Mathematical Society February 2018 FEATURED t¯ y¯ x¯,¯z E (Σs ) → E H � t 118684 156 y 26164 x,z In Honor of Black History Proof of a Null Geometry Graduate Student Section Interview with Chelsea Walton ( ) → Penrose Conjecture by Talithia Williams, Arlie O. Petters,EH Σs M Conducted by Alexander Diaz-Lopez Erica Graham, Raegan Higgins, by Hubert L. Bray and Henri P. Roesch Candice Price, Shelby Wilson, David WHAT IS...the Amplituhedron? Goldberg, Phil Kutzko,Talitha M. by Jacob Bourjaily and Hugh omas Washington, Asamoah Nkwanta, Janet E. Barber, Johnny L. Houston, Edray AMS Graduate Student Blog Herber Goins, and Vernon R. Morris Our special section in honor of Black History Month reminds me how much we owe to the noble souls who have done and are doing so much, often under very difficult circumstances, to turn the broad potential of mathematics into a reality. Of course what we owe them is to join the effort. We are happy to report that for Notices the number of minority authors rose from 17 (8 percent) in 2015 to 35 (17 percent) in 2017. This issue also includes an article on the recent proof of a Null Geometry Penrose Conjecture by Hubert L. Bray and Henri P. Roesch, an article on Jacqueline Ferrand by Pierre Pansu, an interview of Chelsea Walton, and “WHAT IS...the Amplituhedron?” by Jacob Bourjaily and Hugh Thomas. Enjoy the month and the math. —Frank Morgan, Editor-in-Chief FROM THE AMS SECRETARY ALSO IN THIS ISSUE, CONT'D. 115 Call for Nominations: 2019 Leroy P. Steele Prizes 178 From Campus to Congress: Navigating Policy, Procedure, and Politics as an AMS Congressional 182 2017 Election Results Fellow Catherine Paolucci 186 Nomination Petition for the 2018 Election 195 Remembering Donald Sarason ALSO IN THIS ISSUE Sun-Yung Alice Chang, David Cruz-Uribe, John Doyle, and Stephan Ramon Garcia 172 Preliminary Report on the 2016–2017 New Doctoral Recipients 201 Jacqueline Ferrand and Her Oeuvre Amanda L. Golbeck, omas H. Barr, and Pierre Pansu Colleen A. Rose 175 Letters to the Editor Notices of the American Mathematical Society AVAILABLE FOR PREORDER! IN EVERY ISSUE 177 Mathematics Opportunities 188 Inside the AMS 191 Mathematics People 207 Classifi ed Advertising 209 New Publications Off ered by the AMS TEXTBOOK 214 Meetings and Conferences of the AMS Foundations TEXTBOOKS 240 e Back Page and ApplicationsFROM THE AMS of Statistics white --> CURRENT INVITATIONS FROM THE AMS Introduction Using R, Second Edition TEXTBOOK 115 Call for Nominations: 2019 Leroy P. Steele Prizes Randall Pruim, Calvin College, Grand Rapids, MI 117 Mathematical Reviews Seeks Associate Editor This text simultaneously emphasizes both the 163 Make or Support an AMS Fellows Nomination foundational and the computational aspects of modern statistics. Engaging and accessible, this 187 Calls for Nomination: 2018 AMS Election book is useful to undergraduate students with a wide range of backgrounds and career goals. 200 AMS Author Resource Center Pure and Applied Undergraduate Texts, Volume 28; 2018; approximately 833 pages; Hardcover; 206 Apply for an AMS-Simons Travel Grant ISBN: 978-1-4704-2848-8; List US$139.00; AMS members US$111.20; Order code AMSTEXT/28 238 Call for Proposals for JMM 2019 PRE-ORDER YOUR COPY AT bookstore.ams.org/amstext-28TEXTBOOK To exploreTEXTBOOKS more titles in the AMS Pure and Applied UndergraduateFROM THE AMTextsS Series, visit bookstore.ams. org/AMSTEXT white --> = Applied Mathematics TEXTBOOK= Textbook = Available in eBook Format Call for Nominations LEROY P. STEELE PRIZES The selection committee for these prizes requests nominations for consideration for the 2019 awards. Further information about the prizes can be found in the November 2017 Notices p.1203 (also available at www.ams.org/steele-prize). Three Leroy P. Steele Prizes are awarded each year in the following categories: (1) the Steele Prize for Lifetime Achievement: for the cumulative influence of the total mathematical work of the recipient, high level of research over a period of time, particular influence on the development of a field, and influence on mathematics through PhD students; (2) the Steele Prize for Mathematical Exposition: for a book or substantial survey or expository-research paper; and (3) the Steele Prize for Seminal Contribution to Research: for a paper, whether recent or not, that has proved to be of fundamental or lasting importance in its field, or a model of important research. In 2019 the prize for Seminal Contribution to Research will be awarded for a paper in mathematics (open subject area). Further information and instructions for submitting a nomination can be found at the Leroy P. Steele Prizes website: www.ams.org/steele-prize. Nominations for the Steele Prizes for Lifetime Achievement and for Mathematical Exposition will remain active and receive consideration for three consecutive years. For questions contact the AMS Secretary at [email protected]. The nomination period is February 1, 2018 through March 31, 2018. Notices of the American Mathematical Society EDITOR-IN-CHIEF CONTACTING THE NOTICES Frank Morgan SUBSCRIPTION INFORMATION ASSOCIATE EDITORS Subscription prices for Volume 65 (2018) are US$662 list; Benjamin Braun, US$529.60 institutional member; US$397.20 individual mem- Alexander Diaz-Lopez, Thomas Garrity, Joel Hass, ber; US$595.80 corporate member. (The subscription price for Stephen Kennedy, Florian Luca, Steven J. Miller, members is included in the annual dues.) A late charge of 10% of Harriet Pollatsek, Carla Savage (ex officio), the subscription price will be imposed upon orders received from Cesar E. Silva, Christina Sormani, Daniel J. Velleman non-members after January 1 of the subscription year. Add for CONSULTANTS postage: Surface delivery outside the United States and India— John Baez, Hélène Barcelo, Ricardo Cortez, Jerry Folland, US$27; in India—US$40; expedited delivery to destinations in Tara Holm, Kenneth A. Ribet North America—US$35; elsewhere—US$120. Subscriptions and orders for AMS publications should be addressed to the ASSISTANT to the EDITOR-IN-CHIEF American Mathematical Society, PO Box 845904, Boston, MA Sophia D. Merow 02284-5904 USA. All orders must be prepaid. MANAGING EDITOR Rachel L. Rossi ADVERTISING ADVERTISING COORDINATOR Notices publishes situations wanted and classified advertising, Anne Newcomb and display advertising for publishers and academic or scientific organizations. Advertising requests, materials, and/or questions REPRINT PERMISSIONS should be sent to: Erin M. 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