-
Archives
- April 2026
- March 2026
- February 2026
- January 2026
- December 2025
- April 2025
- January 2025
- November 2024
- September 2024
- March 2024
- January 2024
- November 2023
- October 2023
- September 2023
- June 2023
- April 2023
- March 2023
- February 2023
- December 2022
- October 2022
- September 2022
- July 2022
- June 2022
- May 2022
- December 2021
- November 2021
- October 2021
- September 2021
- August 2021
- July 2021
- April 2021
- March 2021
- January 2021
- December 2020
- October 2020
- August 2020
- April 2020
- March 2020
- February 2020
- November 2019
- July 2019
- June 2019
- April 2019
- March 2019
- February 2019
- January 2019
- December 2018
- October 2018
- April 2018
- February 2018
- November 2017
- September 2017
- July 2017
- June 2017
- May 2017
- April 2017
- March 2017
- February 2017
- January 2017
- December 2016
- November 2016
- August 2016
- July 2016
- June 2016
- May 2016
- March 2016
- February 2016
- January 2016
- December 2015
- November 2015
- October 2015
- September 2015
- August 2015
- June 2015
- May 2015
- April 2015
- March 2015
- January 2015
- December 2014
- November 2014
- October 2014
- September 2014
- August 2014
- July 2014
- June 2014
- May 2014
- April 2014
- March 2014
- February 2014
- January 2014
- December 2013
- November 2013
- October 2013
- September 2013
- August 2013
- July 2013
- June 2013
- May 2013
- March 2013
- February 2013
- January 2013
- December 2012
- November 2012
- October 2012
- August 2012
- July 2012
- June 2012
- May 2012
- April 2012
- March 2012
- February 2012
- January 2012
- December 2011
- November 2011
- October 2011
- August 2011
- July 2011
- June 2011
- May 2011
- April 2011
- March 2011
- February 2011
- January 2011
- December 2010
- November 2010
- October 2010
- September 2010
- August 2010
- July 2010
- June 2010
- May 2010
- April 2010
- March 2010
- February 2010
- January 2010
- December 2009
- November 2009
- October 2009
- September 2009
- August 2009
- July 2009
- June 2009
- May 2009
- April 2009
- March 2009
- February 2009
- January 2009
- December 2008
- November 2008
- October 2008
- September 2008
- August 2008
- July 2008
- June 2008
- May 2008
- April 2008
- March 2008
- February 2008
- January 2008
- December 2007
- November 2007
- October 2007
- September 2007
- August 2007
- July 2007
- June 2007
- May 2007
- April 2007
- March 2007
- February 2007
- January 2007
- December 2006
- November 2006
- October 2006
- September 2006
- August 2006
- July 2006
- June 2006
- May 2006
- April 2006
- March 2006
- February 2006
- January 2006
- December 2005
- November 2005
- October 2005
- September 2005
- August 2005
- July 2005
- June 2005
- May 2005
- April 2005
- March 2005
- February 2005
- January 2005
- December 2004
- November 2004
- October 2004
- September 2004
- August 2004
- July 2004
- June 2004
- May 2004
- April 2004
- March 2004
- February 2004
- January 2004
- December 2003
- November 2003
- October 2003
- September 2003
- August 2003
- July 2003
- June 2003
- May 2003
- April 2003
- March 2003
- February 2003
- January 2003
- December 2002
- November 2002
- October 2002
- September 2002
- August 2002
- July 2002
- June 2002
- May 2002
- April 2002
- March 2002
- February 2002
-
Meta
Category Archives: sciences
One Of These Things
I’m looking at a banner ad that says Q. Which is not like the others? 63 57 98 01 I saw quickly that none are prime (1 is usually not counted as prime, so that each integer’s prime factorization is … Continue reading
Posted in mathematics
3 Comments
time-sink of the week
Planarity, a Flash puzzle: rearrange the vertices so that no edges cross. (Cited by Joshua Burton.) When a solution is near, the program gets very slow, which seems backward. (Thursday: It has been changed to test only on the player’s … Continue reading
Posted in mathematics
3 Comments
the asynchronous world
WiReD summarizes the work of Kiwi maverick philosopher Peter Lynds: His answers make the mathematics of space and time look strange. If instants don’t exist, then calculus – in which equations depend on fixed before-and-after positions in space – doesn’t … Continue reading
Posted in sciences
Leave a comment
fun with topology
It’s surprising that I had not heard before of the mathematical sculptor Rinus Roelofs. His Möbius-double could be seen as a metaphor for half-spin particles.
Posted in eye-candy, mathematics
Leave a comment
distributed knowledge wins
I’ve heard that Friedrich von Hayek (1899-1992) started thinking about spontaneous order because of an incident in the Great War. Austrian forces were routed in a battle in Italy, and fled leaderless through the mountains; and far more of them … Continue reading
Posted in economics, security theater
1 Comment
Almost Invented Here — again
Once upon a time, probably 1983, I had an idea to maximize diversity in a representative assembly. You vote for more than one candidate. The ballots are counted once for each seat. On each count one winner is chosen, and … Continue reading
Posted in constitution, economics
7 Comments
go read somewhere else
Tom Knapp on the land problem (inter alia) (cited by Mutualist). (2006: that site has been reorganized; I think this is the same piece, and as a bonus here are two followups.) why drink beer a Martian dust-devil, close up … Continue reading
Posted in astronomy, economics, humanities
Leave a comment