John Wheeler is also a co-father of the Wheeler-DeWitt equation, the vanishing Hamiltonian constraint applied to the “wave function of the Universe” in quantum gravity that is expected to replace the equations of motion as soon as it is properly formulated. The Hartle-Hawking wave function remains the most famous solution of the WDW equation.
— John Wheeler: 1911-2008
— Lubos Motl
2012.08.11 Saturday ACHK
upgrade path
有出路
— Me@2012-08-06 8:28:47 AM
Somewhere in the course of doing Viaweb, someone gave me a very useful piece of advice: users always want an upgrade path, even though as a rule they’ll never take it. Rtml was our upgrade path. If you wanted to, you could get absolute control over everything on your pages.
— Lisp in Web-Based Applications
— Paul Graham
2012.08.11 Saturday (c) All rights reserved by ACHK
Physics Town 