Klein proposed an idea that all these new geometries are just special cases of the projective geometry, as already developed by Poncelet, Möbius, Cayley and others.
He (independently) discovered the properties of the half-twisted strip at the same time as August Ferdinand Möbius, and went further in exploring the properties of strips with higher-order twists (paradromic rings).
Ferdinand Marcos | August Strindberg | Ferdinand Magellan | Franz Ferdinand | August | Ferdinand II of Aragon | Franz Ferdinand (band) | Archduke Franz Ferdinand of Austria | Ferdinand von Mueller | Ferdinand I, Holy Roman Emperor | Ferdinand I | Ferdinand | Papal conclave, August 1978 | Louis-Ferdinand Céline | Ferdinand Foch | Stanisław August Poniatowski | Rio Ferdinand | Ferdinand VII of Spain | Ferdinand de Lesseps | August Derleth | Pernilla August | Ferdinand Porsche | Ferdinand II, Holy Roman Emperor | Ferdinand II | Ferdinand Hodler | Möbius strip | Ferdinand I of Naples | Ferdinand III | August Macke | Gottfried August Bürger |