You want to know what **g-2** is? Well, **g**
is the gyromagnetic ratio for the electron, which is the actual magnetic
moment divided by what it would be if it were a classical ball of spinning
charge with the same angular momentum. Two is the value it would have
for the Dirac equation (relativistic quantum mechanics, but without
radiative corrections). **g-2** is the correction
due to quantum electrodynamics, and is called the **anomalous magnetic
moment of the electron**.

- Elastic Theory has Zero Radius of Convergence.
- What is the radius of convergence?
- Famous Asymptotic Series

Last modified: May 24, 1997

James P. Sethna, sethna@lassp.cornell.edu

Statistical Mechanics: Entropy, Order Parameters, and Complexity, now available at Oxford University Press (USA, Europe).