http://tech.groups.yahoo.com/group/GraphingCalcUsers/ User group for Pacific Tech's Graphing Calculator math education visualization software Mon, 08 Feb 2010 15:35:49 GMT Christopher Young http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1667 http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1667 Sorry, that link is now: http://home.comcast.net/~cy56/ws1/Math/Topology/mobiusSpaceStn.html The idea is to make the concept of an intrinsic test of Mon, 08 Feb 2010 15:23:04 GMT Christopher Young http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1666 http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1666 http://home.comcast.net/~cy56/ws1/Math/Topology/index.html The idea is to make the concept of an intrinsic test of non-orientability clear and vivid. I'm a Mon, 08 Feb 2010 14:04:05 GMT Christopher Young http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1665 http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1665 The table of contents is at http://home.comcast.net/~cy56/ws1/Math/mathtoc.html and some of the new pages are at Sun, 31 Jan 2010 23:26:03 GMT Christopher Young http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1664 http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1664 [PDF] Projective geometry and special relativity File Format: PDF/Adobe Acrobat - Quick View by D Delphenich - 2005 - Cited by 3 - Related articles [22] O. Sun, 31 Jan 2010 23:17:25 GMT Christopher Young http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1663 http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1663 ... At this point, I can't give you a direct answer. But I think that's what physicists probably said about complex arithmetic and analysis, and now it's used Sun, 31 Jan 2010 20:47:29 GMT Steven Rubenstein http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1662 http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1662 Chris, Can you explain projective geometry to me in a nutshell? Steve Sun, 31 Jan 2010 15:56:49 GMT Christopher Young http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1661 http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1661 ... Christopher O. Young ChristopherYoung56@... Everything that doesn't change when you project a figure, just as you'd project a slide on a screen. Sun, 31 Jan 2010 15:35:54 GMT Christopher Young http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1660 http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1660 Had some non-matching subscripts for the focal parameters k relative to the eccentricities, so the major and minor axes of the ellipse and the hyperbola Sun, 31 Jan 2010 15:20:59 GMT Christopher Young http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1659 http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1659 Still working out how to relate all these different approaches to conics. Ultimately, will be in terms of projective geometry and Dandelin spheres, I think. Tue, 26 Jan 2010 15:26:29 GMT Christopher Young http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1658 http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1658 A few more pages added to my GC website. Still entranced by the problem of ruled surfaces. Amazed that any frame that is strung with the same number of strings Mon, 18 Jan 2010 23:53:48 GMT Craig David http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1657 http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1657 I'm going to take the easy way out here because I've got about 49 things that need doing before classes begin. Have a gander at the "Mathematical Physics" Mon, 18 Jan 2010 16:22:02 GMT gjmcclure http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1656 http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1656 Recently I found a site that contains the equations to create the graphs for the electron orbitals (s, p, d, f...) but when I use Graphing Calculator to try to Fri, 11 Dec 2009 12:33:29 GMT dan@... http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1655 http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1655 http://www.wired.com/wiredscience/2009/12/mandelbulb-gallery/ The quest by a group of math geeks to create a three-dimensional analogue for the mesmerizing Sat, 28 Nov 2009 07:22:02 GMT Chris Young http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1654 http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1654 ... If you can upgrade to 3.5 you can use subscripts on the letters to get more variables. I don't think that can be done with GC 3.2. At least I don't see Fri, 27 Nov 2009 23:53:59 GMT n914tj http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1653 http://tech.groups.yahoo.com/group/GraphingCalcUsers/message/1653 I need 45 labels to individually control 45 chords in a polyhedron. There are 26 letters in the alphabet. All 26 of the upper case letters are available, but