English: Construction of coordinates in a not necessarily desarguesian projective plane. Each affine point (not on UV) has a pair (x,y) of coordinates, each out of the ternary ring represented by the affine points on OE. The line at infinity UV is denoted by [infty], its point by a single coordinate (y)
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.