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...
... by definition there is a relation between the focus and the latus rectum of a parabola. As to focus and its evolute, i suppose so, if not direct. ... the...
1) Is there a relationship between the focus of a parabola, its latus rectum, and its evolute? The 1.5 power curve has a cusp at focus. 2) The evolute of the...
An intersting 2D locus, however, I don't know its name. Perhaps the parameteric form is simpler. It is not difficult to derive a relation between th and an...
interesting curve. i also find it interesting to know its application or how it came up. Xah xah@... ∑ http://xahlee.org/ On Apr 11, 2005, at 10:58...
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 ☄...
just created this page: http://xahlee.org/Whirlwheel_dir/reflecting_disks/reflecting_disks.html a photo gallery of reflecting disks. (radio dishes, solar...
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...
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...
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...
excuse my ignorance...(for, this is really a difficult subject :) what exactly is a soliton? Xah Breather breathtaking indeed !! Allow me acomment about...
... 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...
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...
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...
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...
... <mcyberliver@y...> wrote: Our group is devoted to the study of Single Variable Calculus. Topics open for discussion include: limits and continuity, the...
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...
... 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...
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...
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...
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->...
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...
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 =...
Interesting. Any special properties?(chirality etc.) Seems to be a self-intersecting surface. PlotPoints->{41,21} increased surface smoothness of g1 and g2....
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...
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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