- In computability theory, the halting problem is the problem of determining, from a description of an arbitrary computer program and an input, whether the program will finish running, or continue to run forever. The halting problem is undecidable, meaning that no general algorithm exists that solves the halting problem for all possible program–input pairs. The problem comes up often in discussions of computability since it demonstrates that some functions are mathematically definable but not computable.
- Chinatown, San Francisco (Wikipedia)
The Chinatown centered on Grant Avenue and Stockton Street in San Francisco, California, (Chinese: 唐人街; pinyin: tángrénjiē; Jyutping: tong4 jan4 gaai1) is the oldest Chinatown in North America and one of the largest Chinese enclaves outside Asia. It is also the oldest and largest of the four notable Chinese enclaves within San Francisco. Since its establishment in the early 1850s, it has been important and influential in the history and culture of ethnic Chinese immigrants in North America. Chinatown is an enclave that has retained its own customs, languages, places of worship, social clubs, and identity.