Kiran S. (Sridhara) Kedlaya (he/him/él/il)
Professor of Mathematics
Stefan E. Warschawski Chair in Mathematics
Department of Mathematics, Room 7202
University of California San Diego (no comma!)
La Jolla, CA 920930112 (land acknowledgment, variant)
email: kedlaya[at]ucsd[dot]edu (public key)
voicemail: (+1) 8585342629 (no live phone)
headshot: jpg (Laurie DeWitt, 2019)
me on: arXiv, GitHub,
NSFPAR,
ORCID,
UC open access
Note: I do not control any accounts on social media platforms (e.g., Facebook, Instagram, LinkedIn, Twitter). I highly recommend this life choice!
News (see also past news)
The Park City Mathematics Institute will be running virtually in July 2021 with most of its usual components, many of which may be of interest to number theorists. All applications are due April 5. (13 Mar 2021)
I will continue to hold online office hours on Mondays during spring 2021, plus a social "number theory tea" 4:305:00pm PDT (new time). If you wish to schedule a meeting or join tea, email me for the Zoom links. (26 Feb 21)
I have updated the Putnam Archive with the problems and solutions from the "2020" competition. Due to the COVID19 pandemic, this competition was actually held February 20, 2021 and run in an unofficial mode; consequently, while individual solvers will receive their scores (as will their institutions), there will be no official announcement of results. (22 Feb 21)
For those following the Arizona Winter Semester unofficially, there is now an option to request access to the Zulip discussion server to engage in discussion about the lectures. (7 Feb 21)
My paper Space vectors forming rational angles with Kolpakov, Poonen, and Rubinstein has been featured in Quanta Magazine. There is also a followup article describing some related ongoing work. (2 Feb 21; updated 9 Feb 21)
As of February 1, I will be starting a threeyear term on the Council of the American Mathematical Society. If you have anything on your mind that might be of interest to the Council, please get in touch! (30 Jan 21)
During spring 2021, I will be teaching a topics course on prismatic cohomology. I plan to post lecture videos and operate a discussion server open to the public; see the course website for details. (21 Jan 21)
Fast facts (see also my CV)
Teaching for 20202021:
 fall 2020: Math 204A (Number Theory) plus an "epicourse" for the world; see the web site.
 winter 2020: Math 187A (Introduction to Cryptography); Math 204B (Number Theory) plus an epicourse. (See also Thomas Grubb's Math 157 site.)
 spring 2021: Math 206 (Topics in Algebraic Geometry) plus an epicourse. Topic: prismatic cohomology.
Teaching for 20192020:
 fall 2019: Math 206A (Topics in Algebraic Geometry).
 winter 2020: Math 157 (Intro to Math Software); Math 203B (Algebraic Geometry).
 spring 2020: none.
See also my past courses.
Research areas: number theory, arithmetic algebraic geometry. Specialties: padic Hodge theory, padic/nonarchimedean analytic geometry, padic differential equations, algorithms in arithmetic geometry (particularly related to Lfunctions), interactions between arithmetic geometry and computer science (cryptography, coding theory, etc.). For more, see my questions of interest.
Editorial boards: Nagoya Mathematical Journal, LFunctions and Modular Forms Database.
Boards of directors: Art of Problem Solving Initiative (this includes governance of Bridge to Enter Advanced Mathematics), board Chair for Pro Mathematica Arte (this includes governance of Budapest Semesters in Mathematics and Budapest Semesters in Mathematics Education). I am also the Chair of the steering committee for the Algorithmic Number Theory Symposium conference series. As of February 2021, I will be serving a threeyear term on the Council of the American Mathematical Society and the AMS Committee on Publications.
Current grants: NSF grant DMS1802161 (sole PI); NSF RTG grant DMS1502651 (coPI); NSF grant DMS1844206 (custodial PI). I am also an advisory board member for the UTMOST Project (interactive opensource mathematics textbooks), an advisory board member for the Southwest Center for Arithmetic Geometry (including the Arizona Winter School), and an associated scientist of the Simons Collaboration on Arithmetic Geometry, Number Theory and Computation.
Professional societies: American Mathematical Society, Mathematical Association of America, Association for Women in Mathematics, National Association of Mathematicians.
Software projects: I am an active user and developer of the SageMath opensource computer algebra system. I am a contributor to the LMFDB. Some of my other projects can be found on GitHub.
Other websites: I am a curator for MathMeetings, from which my conference list in arithmetic geometry is now derived. I maintain the Putnam Archive within this website; however, the UCSD Putnam coordinator is Daniel Kane.
Social justice: My work with the BEAM program seeks to create pathways to STEM careers for highpotential K12 students from underserved backgrounds. I am a proud alum of the PCMIIAS Workshop on Rehumanizing Mathematics led by the phenomenal Rochelle Gutiérrez. I am a Math Alliance mentor. I selfidentify as firstgen.
Tips for reaching me by email
In case you send me an email and get no response, the following tips may help you diagnose the issue. I typically process my email as a lastinfirstout (LIFO) queue, with some modification so that responses that take less time to write get written sooner. In particular, a single message containing multiple issues may take significantly longer to elicit a response than multiple messages containing single issues.
 At the moment, I do not have time to review grant proposals or to write full referee reports for articles. I may be able to provide quick evaluations for papers that are sufficiently close to my expertise; however, as of January 2021 I have decided to accept only requests for "doublyanonymous" opinions, i.e., those for which the names of the authors have been suppressed.

My direct supervision of students is typically limited to students at UCSD (or participating in a program affiliated with UCSD), and takes the following forms. (Disregard if you found me through Math Alliance.)
 For undergraduates: faculty coordinator for an offcampus internship (Math 197), reading course/honors thesis (Math 199H).
 For graduate students: reading course/PhD thesis (Math 299), dissertation committee (including as an external member).
 Regarding recommendation letters, see my separate page.
 The UCSD math department has had some issues with its mail server, leading to silent loss of some messages or attachments. It might help to change the sending address. In case of emergency, try voicemail (or my nonUCSD email address or cell phone number if you have one of those).
Fine print
Opinions expressed on this site are mine alone and may not reflect the views of past or present employers, funding agencies, collaborators, professional organizations, or governments. Conversely, offsite material need not reflect my views unless it indicates my authorship.
This site is independently hosted (currently by Arvixe) and funded; I have not been compensated for any content. Access to the site may have been degraded by the recent weakening of the Federal Communications Commission net neutrality policy. In addition, if you are viewing this web site in the US, your Internet service provider may have the right to sell your user data.
This site does not collect or store any identifiable user data. It is thus compliant with the EU General Data Protection Regulation and the California Consumer Privacy Act.
Due to lack of time and energy, this site has not been optimized for viewing on mobile phones or other small screens. It has also not been optimized for screen readers or other accessibility tools, but I would welcome advice about this. (See also the PreTeXt project.)
Aunque este sitio está disponible solamente en inglés, puedo responder al correo electrónico en español (con dificultad).
Bien que ce site ne soit disponible qu'en anglais, je peux répondre aux courriels en français (avec difficulté).
Obwohl diese Seite nur auf Englisch verfügbar ist, kann ich auf EMails auf Deutsch antworten (mit großen Schwierigkeiten).
Хотя этот сайт доступен только на английском языке, я могу отвечать на электронные письма на русском языке (с огромными трудностями).
对不起，我无法用中文回复电子邮件. (太难了!)