EntityQ11831792· pop 7· linked from 48 articlesideal pointSign in to savepoint at infinity in hyperbolic geometryConnectionspoint at infinityEntityInternational Standard Book NumberEntityquadrilateralEntitydigital object identifierEntityInternational Standard Serial NumberEntitycurveEntityunit circleEntityperpendicularityEntitymanifoldEntityvertexEntityhyperbolic geometryEntityConvergenceEntityconcentricEntityMathematical ReviewsEntityunit diskEntityunit sphereEntityhyperbolic triangleEntitywell-definedEntityexterior angle theoremEntityPasch's axiomEntityCategoriesHyperbolic geometryInfinity