Schläfli made an important contribution to non- Euclidean (elliptic) geometry when he proposed that spherical three-dimensional space could be regarded as the surface of a hypersphere in Euclidean four-dimensional space.
Schläfli na ginawa ng isang mahalagang kontribusyon sa mga di-Euclidean (tambilugin) geometry kapag siya iminungkahi na pabilog ng three-dimensional space ay maaaring regarded bilang ang ibabaw ng isang hypersphere sa Euclidean apat na-dimensional space.