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John C. Baez
John Baez, physicist (2009).jpg
John C. Baez (August 2009)
John Carlos Baez

(1961-06-12) June 12, 1961 (age 59)
San Francisco, California, United States
EducationPrinceton University (undergraduate)
Massachusetts Institute of Technology (PhD)
Yale University (post-doctoral research)
Spouse(s)Lisa Raphals
AwardsLevi L. Conant Prize (2013)[1]
Scientific career
FieldsMathematics, mathematical physics
InstitutionsUniversity of California, Riverside
ThesisConformally Invariant Quantum Fields (1986)
Doctoral advisorIrving Segal
Doctoral studentsAlissa Crans

John Carlos Baez (/ˈbɛz/; 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 has worked on spin foams in loop quantum gravity, applications of higher categories to physics, and applied category theory.

Baez is also the author of This Week's Finds in Mathematical Physics,[3] 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.[4] Additionally, Baez is known on the World Wide Web as the author of the crackpot index.

Early life and education

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.


Baez was a post-doctoral researcher at Yale University. Since 1989, he has been a faculty member 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.[citation needed]

Baez's research includes work on spin foams in loop quantum gravity.[5][6] He also worked on applications of higher categories to physics,[7][8] such as the cobordism hypothesis. Later in his career, he worked on applied category theory, including network theory.[9]


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.[10]

Baez is also co-founder of the n-Category Café (or n-Café), a group blog concerning higher category theory and its applications, as well as its philosophical repercussions. The founders of the blog are Baez, David Corfield and Urs Schreiber, and the list of blog authors has extended since. The n-Café community is associated with the nLab wiki and nForum forum, which now run independently of n-Café. It is hosted on The University of Texas at Austin's official website.


His uncle Albert Baez was a physicist, the inventor of the X-ray microscope, and father of singer and progressive activist Joan Baez. Albert interested him in physics as a child.[11]

John Baez is married to Lisa Raphals who is a professor of Chinese and comparative literature at UCR.[12][13]

Selected publications


  • 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.CS1 maint: ref=harv (link)


  • An Introduction to Algebraic and Constructive Quantum Field Theory, with Irving Segal and Zhengfang Zhou, Princeton University Press, 1992.
  • Knots and Quantum Gravity, editor, Oxford University Press, 1994.
  • Gauge Fields, Knots, and Gravity, with Javier Muniain, World Scientific Press, 1994.
  • Towards Higher Categories, editor, with Peter May, Springer, Berlin, 2009.
  • Infinite-Dimensional Representations of 2-Groups, with Aristide Baratin, Laurent Freidel and Derek Wise, Memoirs of the American Mathematical Society 1032, Providence, Rhode Island, 2012.
  • Quantum Techniques for Stochastic Mechanics, with Jacob Biamonte, World Scientific Press, Singapore, 2018.


  1. ^ "2013 Conant Prize" (PDF), Notices of the AMS, 60 (4): 484–485, April 2013
  2. ^ UC Riverside, Department of Mathematics
  3. ^ This Week's Finds
  4. ^ Lieven LeBruyn, The unbearable lightness of math-blogging, August 23, 2007
  5. ^ Baez, John C. (1998), "Spin foam models", Class. & Quantum Gravity 15, 1827–1858
  6. ^ Top Cited Articles of All Time (2004 edition) in gr-qc
  7. ^ John Baez Diary – January 2010, 1 January 2010
  8. ^ John C. Baez and Aaron Lauda, A Prehistory of n-Categorical Physics, Deep Beauty, 13–128, Cambridge Univ. Press, Cambridge, (2011).
  9. ^ [ John Baez, Network theory.
  10. ^ "The Azimuth Project".
  11. ^ "Interview by David Morrison". Retrieved May 24, 2009.
  12. ^ February 17, 2007 – Lisa Raphals and I got married today! (Diary – February 2007)
  13. ^ "Lisa Raphals (UCR faculty page)". Archived from the original on May 3, 2014. Retrieved May 3, 2014.


External links


This page was last edited on 26 June 2020, at 20:10
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