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The IBM 5100 Portable Computer is a portable computer (one of the first) introduced in September 1975, six years before the IBM Personal Computer, and eight before the first successful IBM compatible portable computer, the Compaq Portable. It was the evolution of a prototype called the SCAMP (Special Computer APL Machine Portable) that was developed at the IBM Palo Alto Scientific Center in 1973. Whether considered evolutionary from SCAMP or revolutionary, it still needed to be plugged into an electric socket.When the IBM PC was introduced in 1981, it was originally designated as the IBM 5150...
Generally when things get deleted, it's for a good reason, and we don't want users to be undeleting them -- there's a reason we require 10k rep to "see" deleted items at all, and only moderators can see deletions in a user's profile.
A Hanukkah film is a genre of film in which the main emphasis is on the celebration of the Jewish holiday of Hanukkah. Films in this style traditionally incorporate the religious aspects of Hanukkah, such as lighting the menorah and the story of the Maccabees, as well as the cultural aspects of Hanukkah, such as spinning dreidels, or eating traditional foods such as latkes, sufganiyot, or gelt. Films in this genre are typically similar to comedy and romantic comedy films in content, however some are similar in style to action, drama, and animated films, among other genres. Hanukkah films are more...
SageMath, 92 bytes
def f(x,y,z,w):
for v in'abcd':var(v,domain=ZZ)
return solve([a*x+b*y+c*z+d*w==0],a,b,c,d)
Try it online!
0
Disprove my group theory
This is a cops-and-robbers challenge, based around abstract-algebra. The following includes some basic definitions applicable to both the cops and the robbers.
Going back to basics, we have a couple of definitions, for the purposes of the challenge:
A number is a number ...
A recent news report suggests that China has an ambitious plan:
to send three artificial moons into space in the next four years
that would be
bright enough to replace the streetlights in the south-western city of Chengdu by 2020
The source of the report is "state media People's Daily...
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