User contributions for 222.164.140.80

2 September 2012

• 08:4008:40, 2 September 2012 diff hist +4,655 N Epicycloid removed unexplained and out-of-context sentence "there are different types of epicycloids, like the epicycloid of cremona".
• 02:3202:32, 2 September 2012 diff hist +5,742 N Nephroid →...an envelope of lines: changed "4" to "4 degrees" for clarity