just made an update to the breather surface, with graphing calc file & Mathematica file. http://www.xahlee.org/surface/breather_p/breather_p.html Xah ☄...
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Xah Lee
p0lyglut
Apr 23, 2005 5:03 pm
just created this page: http://xahlee.org/Whirlwheel_dir/reflecting_disks/reflecting_disks.html a photo gallery of reflecting disks. (radio dishes, solar...
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Hop David
hollister_david
Apr 23, 2005 8:31 pm
There was a toy that had a virtual pig floating in air. There was an actual pig at the base of the toy and his virtual image was at the focus of a parabolic...
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Narasimham Gudipaty
glnarasimham
Apr 24, 2005 12:55 pm
Breather breathtaking indeed !! Allow me acomment about related Three soliton surface with K= -1. One sees K > 0 areas in the peripheral regions of the...
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Narasimham Gudipaty
glnarasimham
Apr 24, 2005 2:50 pm
Better to say Reflector dishes instead of reflecting disks. The TV dish receiver is not necessarily parabolic, since the focus is below the center of the dish...
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xah lee
p0lyglut
Apr 24, 2005 3:32 pm
yes i remember seeing that in Nature store. I thought i saw it on wikipedia too... but anyway they have a good article on mirage ...
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Xah Lee
p0lyglut
Apr 24, 2005 6:06 pm
excuse my ignorance...(for, this is really a difficult subject :) what exactly is a soliton? Xah Breather breathtaking indeed !! Allow me acomment about...
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Xah Lee
p0lyglut
Apr 24, 2005 6:10 pm
... I took your advice. ... if that means the surface is a surface of revolution. If so, the focus must be in the center. But that TV disk has the receiving...
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xah lee
p0lyglut
Apr 24, 2005 9:38 pm
btw, excuse my ignorance, what exactly is a soliton? Xah On Apr 24, 2005, at 5:55 AM, Narasimham Gudipaty wrote: Breather breathtaking indeed !! Â Allow me...
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Xah Lee
p0lyglut
Apr 26, 2005 11:51 am
Added a Mathematica notebook and Graphing Calc file to the Kuen surface: http://xahlee.org/surface/kuen/kuen.html try to plot it in your fav plotter! quite a...
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Narasimham Gudipaty
glnarasimham
May 1, 2005 5:34 pm
Xah Lee <xah@...> wrote: excuse my ignorance...(for, this is really a difficult subject :)What exactly is a soliton? I was referring to another image in...
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mcyberliver
May 9, 2005 4:02 am
... <mcyberliver@y...> wrote: Our group is devoted to the study of Single Variable Calculus. Topics open for discussion include: limits and continuity, the...
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aneesh venkatraman
aneesh_82
Aug 28, 2005 4:57 pm
I am looking for literature on the curve, "Alysoid". If anyone has come across any book or a publication in which these curves are described, please let me...
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glnarasimham
Aug 29, 2005 11:00 pm
... Same as Catenary, a very familiar curve. From Mathworld Wolfram site: "The word catenary is derived from the Latin word for "chain." In 1669,Jungius...
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Joseph Ferrara
jpferrara06379
Aug 31, 2005 11:49 pm
Hi, May I ask a question that has bugged me for some time. I had a wall plack which was an ordinate and abscissa consisting of evenly spaced nails embedded in...
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Narasimham Gudipaty
glnarasimham
Sep 1, 2005 3:07 am
At one instant let the x,y intercepts be (a,b).The constant sum of ix,y, intercepts is a+ b = c ; It is a parabola passing through (a+b,0), (0,a+b) tangential...
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Narasimham Gudipaty
glnarasimham
Sep 1, 2005 11:21 pm
Continuation of the last reply ... Mathematica code if it helps : a=5 ; b=3 ; ParametricPlot3D[ {x,(b+t)*(1-x/(a-t)),0}, {x,0,16},{t,-8,8}, PlotPoints->...
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glnarasimham
Sep 12, 2005 3:58 pm
The natural equation of a given curve is curvature = f(s). Find the natural equation of an offset curve distant + / - p from it. p is parallel distance and s...
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Roger L. Bagula
rlbagulatftn
Oct 24, 2005 6:28 pm
Dear glnarasimham, Just joined egroup here. Could you repond to my email at: rlbagulatftn@... with your current email address. Roger...
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Roger Bagula
rlbagulatftn
Oct 25, 2005 9:26 pm
A new Clifford torus type surface using a six cordinate triaxial model: ( Mathematica Notebook) x1 = Cos[t]; x2 = Cos[t + 2*Pi/3]; x3 = Cos[t - 2*Pi/3]; y1 =...
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Narasimham Gudipaty
glnarasimham
Oct 26, 2005 4:07 am
Interesting. Any special properties?(chirality etc.) Seems to be a self-intersecting surface. PlotPoints->{41,21} increased surface smoothness of g1 and g2....
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Roger Bagula
rlbagulatftn
Oct 26, 2005 11:00 pm
... The symmetrical version : x=x1/(Sqrt[2]+y1) y=x2/(Sqrt[2]+y2) z=x3/(Sqrt[2]+y3) is very pretty. Roger L. Bagula { email: rlbagula@... or...
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Saad Amin
saadamin82
Apr 2, 2006 4:26 pm
Sir, Actually i am doing project RF RANGE FINDER which will calculate the location and direction of FM radio station only within certain range u can say if...
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saad amin
saadamin82
Apr 2, 2006 4:26 pm
Assslam io alikum Sir, Actually i am doing project RF RANGE FINDER which will calculate the location and direction of FM radio station only within certain...
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melihturgut_deu
Jul 28, 2006 7:38 pm
Hi, everyone Im new within you. I m a MSc student. I m researching Spherical Indicators in Lorentzian Space. Could you have some files abaout it?...
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Chris Young
c1572young
Oct 17, 2006 5:18 pm
Thought you might be interested in this as an example of illustrating algebraic geometry with Graphing Calculator. Free GC viewers are available at...
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Chris Young
c1572young
Oct 18, 2006 1:25 am
I'm not exactly sure why this is working, but I've finally got overlapping stripes to show how the positive area (in this case, the yellow triangle outside...
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Chris Young
c1572young
Oct 19, 2006 7:18 pm
Here, I've just used the unit normal vector to thicken the border of the main triangle to distinguish it from the sub-triangles (thinner, colored borders). ...
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Chris Young
c1572young
Jan 11, 2007 6:10 pm
Here, I've added the draggable complex point q through which there's a unique equiangular spiral going through (1, 0) and with "collapsed radius" of 1. By...
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xah lee
p0lyglut
Feb 15, 2008 10:14 am
lots update in the past 2 months. About 20 GeoGebra files are added. See: http://xahlee.org/SpecialPlaneCurves_dir/Intro_dir/whatsNew.html Xah xah@... ...
