**John Carlos Baez** (/ˈbaɪˌɛz/; born June 12, 1961) is an American mathematical physicist and a professor of mathematics at the University of California, Riverside (UCR)^{[2]} in Riverside, California. He is known for his work on spin foams in loop quantum gravity.^{[3]}^{[4]} For some time, his research had focused on applications of higher categories to physics and other things.^{[5]}^{[6]}

Baez is also known to science fans as the author of *This Week's Finds in Mathematical Physics*,^{[7]} an irregular column on the internet featuring mathematical exposition and criticism. He started *This Week's Finds* in 1993 for the Usenet community, and it now has a following in its new form, the blog "Azimuth". *This Week's Finds* anticipated the concept of a personal weblog.^{[8]} Additionally, Baez is known on the World Wide Web as the author of the crackpot index.

Baez was born in San Francisco, California. He graduated from Princeton University in Princeton, New Jersey, with a Bachelor of Arts in mathematics in 1982. In 1986, he graduated from the Massachusetts Institute of Technology in Cambridge, Massachusetts, with a Doctor of Philosophy under the direction of Irving Segal. After a post-doctoral period at Yale University in New Haven, Connecticut, he has been teaching — since 1989 — at UC Riverside. From 2010 to 2012, he took a leave of absence to work at the Centre for Quantum Technologies in Singapore and has since worked there in the summers.

Baez runs the blog "Azimuth," where he writes about a variety of topics ranging from *This Week's Finds in Mathematical Physics* to the current focus, combating climate change and various other environmental issues.^{[9]}

Baez is also co-founder of the ** n-Category Café** (or

His physicist uncle, Albert Baez (inventor of the X-ray microscope and father of singer and progressive activist Joan Baez), interested him in physics as a child.^{[10]}

John Baez is married to Lisa Raphals who is a professor of Chinese and comparative literature at UCR.^{[11]}^{[12]}

- Baez, John C. (2002). "The Octonions".
*Bulletin of the American Mathematical Society*.**39**(2): 145–205. arXiv:math/0105155v4 . doi:10.1090/S0273-0979-01-00934-X. ISSN 0273-0979. MR 1886087.

**^**"2013 Conant Prize" (PDF),*Notices of the AMS*,**60**(4): 484–485, April 2013**^**UC Riverside, Department of Mathematics**^**Baez, John C. (1998), "Spin foam models",*Class. & Quantum Gravity*15, 1827–1858**^**Top Cited Articles of All Time (2004 edition) in gr-qc**^**John Baez Diary - January 2010, 2010-01-01**^**John C. Baez and Aaron Lauda,*A Prehistory of n-Categorical Physics*, Deep beauty, 13-128, Cambridge Univ. Press, Cambridge, (2011).**^**This Week's Finds**^**Lieven LeBruyn, The unbearable lightness of math-blogging, 23 August 2007**^**"The Azimuth Project".**^**"Interview by David Morrison". Retrieved May 24, 2009.**^**February 17, 2007 - Lisa Raphals and I got married today! (Diary - February 2007)**^**Lisa Raphals (UCR faculty page)

- Baez, John C., ed. (1994).
*Knots and quantum gravity*. Oxford: Clarendon Press, an imprint of the Oxford University Press. ISBN 0-19-853490-6. - Baez, John C.; Muniain, Javier (1994).
*Gauge fields, knots and gravity*. Singapore: World Scientific. ISBN 981-02-2034-0. - Baez, John C.; Segal, Irving E. & Zhou, Zhenfang (1992).
*Introduction to algebraic and constructive quantum field theory*. Princeton: Princeton University Press. ISBN 0-691-08546-3. - Baez, John C. (1996) Spin networks in gauge theory,
*Advances in Mathematics*117, 253–272 - Baez, John C. (1998) Quantum geometry & black hole entropy, w. A. Ashtekar, A. Corichi & K. Krasnov,
*Phys. Rev. Lett.*80, 904–907.

Wikiquote has quotations related to: John C. Baez |

- Baez's home page at UCR's official website (ucr.edu)
- Azimuth blog by Baez
- The
*n*-Category Café - Home page in
*n*Lab

- "Should I be thinking about quantum gravity?", essay by Baez at The World Question Center