ONE UP CONES MUSHROOM FUNDAMENTALS EXPLAINED

Based on G. B. Halsted, a cone is produced likewise to your Steiner conic only by using a projectivity and axial pencils (not in viewpoint) as opposed to the projective ranges useful for the Steiner conic:In projective geometry, a cylinder is simply a cone whose apex is at infinity, which corresponds visually to some cylinder in point of view appea