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----Catenoid----
X = 2*cosh(v/2)*cos(u)
Y = 2*cosh(v/2)*sin(u)
Z = v
With U[ -pi, pi] And V[ -pi, pi]

----Shoe----
X = u
Y = v
Z = 1/3*u^3 - 1/2*v^2
With U[ -2, 2] And V[ -2, 2]

----Heliciodal----
X = sinh(v)*sin(u)
Y = -sinh(v)*cos(u)
Z = 3*u
With U[ -pi, pi] And V[ -pi, pi]

----Cresent---
X = (2 + sin(2* pi* u) *sin(2 *pi* v)) *sin(3* pi *v)
Y = (2 + sin(2* pi *u) *sin(2 *pi *v)) *cos(3* pi *v)
Z = cos(2* pi *u) *sin(2* pi* v) + 4 *v - 2
With U[ 0, 1] And V[ 0, 1]

----Hyperhelicoidal----
X = (sinh(v)*cos(3*u))/(1+cosh(u)*cosh(v))
Y = (sinh(v)*sin(3*u))/(1+cosh(u)*cosh(v))
Z = (cosh(v)*sinh(u))/(1+cosh(u)*cosh(v))
With U[ -pi, pi] And V[ -pi, pi]

Aug 22, 2007
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===== Hexaedron =====X = cos(v)^3*cos(u)^3
Y = sin(v)^3*cos(u)^3
Z = sin(u)^3
With U[ -1.3, 1.3] And V[ 0, 2*pi]

===== Catalan =====
X = u-sin(u)*cosh(v)
Y = 1-cos(u)*cosh(v)
Z = 4*sin(1/2*u)*sinh(v/2)
With U[ -pi, 3*pi] And V[ -2, 2]

===== Toupie =====
X = (abs(u)-1)^2 * cos(v)
Y = (abs(u)-1)^2 * sin(v)
Z = u
With U[ -1, 1] And V[ 0, 2*pi]

===== Trumpet =====
X = cos(u)*sin(v)
Y = sin(u)*sin(v)
Z = (cos(v)+log(tan(1/2*v)))
With U[ 0, 2*pi] And V[ 0.03, 2]

===== Kuen =====
X = (2*(cos(u) + u*sin(u))*sin(v))/(1+ u^2*sin(v)^2)
Y = (2*(sin(u) - u*cos(u))*sin(v))/(1+ u^2*sin(v)^2)
Z = log(tan(1/2 *v)) + (2*cos(v))/(1+ u^2*sin(v)^2)
With U[ 0, 2*pi] And V[ 0.01, pi-0.01]

Jul 03, 2007
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Jun 23, 2007
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===== Riemann =====x(u,v)=u*v
y(u,v)=v^2 - u^2
z(u,v)=30*u
-6<=u<=6,-25<=v<=25
===== Klein 2 =====
x(u,v)=(2 + cos(v/2)* sin(u) - sin(v/2)* sin(2 *u))* cos(v)
y(u,v)=(2 + cos(v/2)* sin(u) - sin(v/2)* sin(2 *u))* sin(v)
z(u,v)=sin(v/2)* sin(u) + cos(v/2) *sin(2* u)
0<=u<=2*Pi,o<=v<=2*Pi
===== Hennenberg =====
x(u,v)=2*sinh(u)*cos(v) -(2/3)*sinh(3*u)*cos(3*v)
y(u,v)=2*sinh(u)*sin(v) +(2/3)*sinh(3*u)*sin(3*v)
z(u,v)=2*cosh(2*u)*cos(2*v)
-1<=u<=1,-Pi/2<=v<=Pi/2
===== Eneper =====
x(u,v)=u -u^3/3 + u*v^2
y(u,v)=v -v^3/3 + v*u^2
z(u,v)=u^2 - v^2
-2<=u<=2,-2<=v<=2
===== Helix =====
x(u,v)=(1-0.1*cos(v))*cos(u)
y(u,v)=(1-0.1*cos(v))*sin(u)
z(u,v)=0.1*(sin(v) + u/1.7 -10)
0<=u<=4*Pi,0<=v<=2*Pi
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===== Klein ========
x(u,v)=(3*(1+sin(v)) + 2*(1-cos(v)/2)*cos(u))*cos(v)
y(u,v)=(4+2*(1-cos(v)/2)*cos(u))*sin(v)
z(u,v)=-2*(1-cos(v)/2) * sin(u)
0<=u<=2*Pi,0<=v<=2*Pi

=====ãShell =====
x(u,v)=1.2^v*(sin(u)^2 *sin(v))
y(u,v)=1.2^v*(sin(u)^2 *cos(v))
z(u,v)=1.2^v*(sin(u)*cos(u))
0<=u<=Pi,-Pi/4<=v<=5*Pi/2

==== Trus =====
x(u,v)=(1+ 0.5*cos(u))*cos(v)
y(u,v)=(1+ 0.5*cos(u))*sin(v)
z(u,v)=0.5*sin(u)
0<=u<=2*Pi,0<=v<=2*Pi

===== Cosinus =====
x(u,v)=u
y(u,v)=v
z(u,v)=sin(pi*((u)^2+(v)^2))/2
-1<=u<=1,-1<=v<=1

===== Moebius =====
x(u,v)=cos(v)+u*cos(v/2)*cos(v)
y(u,v)=sin(v)+u*cos(v/2)*sin(v)
z(u,v)=u*sin(v/2)
-0.4<=u<=0.4,0<=v<=2*Pi

Jun 19, 2007
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