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@... ...
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...
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). ...
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...
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...
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...
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 =...
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...
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...
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...
... <mcyberliver@y...> wrote: Our group is devoted to the study of Single Variable Calculus. Topics open for discussion include: limits and continuity, the...
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 ☄...
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...
just created this page: http://xahlee.org/Whirlwheel_dir/reflecting_disks/reflecting_disks.html a photo gallery of reflecting disks. (radio dishes, solar...
I am new in this group. I am a Spanish math teacher in a secondary school and I have a question about a curve. Let P mover on the ellipse x^2/a^2+y^2/b^2 = 1...
1) Is there a relationship between the focus of a parabola, its latus rectum, and its evolute? 2) The evolute of the spiral x= cost + tsint, y= sint - tsint...
Mike Williams send me some wonderful parametric formulas for modeling seashells. ... spindle shell R=1; // radius of tube N=5.6; // number of turns H=4.5;...
added a folium of Descartes stamp! http://xahlee.org/SpecialPlaneCurves_dir/FoliumOfDescartes_dir/ foliumOfDescartes.html anyone know other stamps featuring...
This is just to describe the construct of the curve and then I want to ask what kind of curve is it, is it a parabola? Secondly how can I get into the math of...
I added a photo page on Curlicue. See http://xahlee.org/SpecialPlaneCurves_dir/Curlicue_dir/curlicue.html has anyone seen interesting examples? i know that...
i just learned that the locus of cusps of parallel curves is the evolute of the given curve. this is interesting, because it is a alternative definition of ...
Just created a page on curvature and tangent circle. See http://xahlee.org/SpecialPlaneCurves_dir/Curvature_dir/curvature.html the interesting idea is the...
here are 3 curves illustrating 3 cusps (at t=0) that has different curvatures. {t^2, t^3} {t^2, t^5} {t^2 + t^3, t^4} first case has curvature Infinity. Second...
recently i started a mailing lists on Python and Java programing. I started it about a month ago, in which i give daily tips or commentary about them as i...
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