hello,
pcla.zip : Vertical, Horizontal shift.
pclb.zip : Scaling relative to the origin and to a point P.
pclc.zip : Rotation about the origin and about a point P.
pcld.zip : Shearing along the xy-axis.
pcle.zip : Reflexion about the yx-axis.
pclf.zip : Translated change of axes. Rotated change of axes.
pcma.zip : Find the coefficients of a polynomial, that passes through three,
four, five points.
pcmb.zip : Find the coefficients of a conic.
pcmc.zip : Find the coefficients of a circle.
thank