Search Results for ""
5101 - 5110 of 13135 for science historySearch Results

AW, AB, and AY in the above figure are in a harmonic range.
Given a parabola with parametric equations x = at^2 (1) y = at, (2) the evolute is given by x_e = 1/2a(1+6t^2) (3) y_e = -4at^3. (4) Eliminating x and y gives the implicit ...
The inverse curve for a parabola given by x = at^2 (1) y = 2at (2) with inversion center (x_0,y_0) and inversion radius k is x = x_0+(k(at^2-x_0))/((at^2+x_0)^2+(2at-y_0)^2) ...
The involute of a parabola x = at^2 (1) y = at (2) is given by x_i = -(atsinh^(-1)(2t))/(2sqrt(4t^2+1)) (3) y_i = a(1/2t-(sinh^(-1)(2t))/(4sqrt(4t^2+1))). (4) Defining ...
For a parabola oriented vertically and opening upwards, the vertex is the point where the curve reaches a minimum.
A cyclide formed by inversion of a standard torus when inversion sphere is tangent to the torus.
A quadratic surface given by the equation x^2+2rz=0.
A fixed point of a linear transformation for which the rescaled variables satisfy (delta-alpha)^2+4betagamma=0.
A parabolic cyclide formed by inversion of a horn torus when the inversion sphere is tangent to the torus.
A partial differential equation of second-order, i.e., one of the form Au_(xx)+2Bu_(xy)+Cu_(yy)+Du_x+Eu_y+F=0, (1) is called parabolic if the matrix Z=[A B; B C] (2) ...

...