EntityQ1475760· pop 23· linked from 285 articlesprojective planeSign in to savegeometric concept of a 2D space with a "point at infinity" adjoinedConnectionshomographyEntityfieldEntityDesargues' theoremEntityPappus's hexagon theoremEntityGraeco-Latin squareEntityRaj Chandra BoseEntityDobbleEntityincidenceEntitymathematicsEntityLeonhard EulerEntityInternational Standard Book NumberEntityDavid HilbertEntitycomplex numberEntityintegerEntityreal numberEntitytopologyEntitydigital object identifierEntitysymmetryEntityInternational Standard Serial NumberEntitygroupEntityCategoriesAlgebraic geometryComputer-assisted proofsEuclidean plane geometryHypergraphsIncidence geometryProjective geometry