Source: wikibot/eells-kuiper-manifold
= Eells–Kuiper manifold
{wiki=Eells–Kuiper_manifold}
The Eells–Kuiper manifold is a specific type of mathematical object in the field of differential geometry and topology. It is characterized as a compact and connected 4-dimensional manifold that is non-orientable. The construction of the Eells–Kuiper manifold is notable for being one of the first examples of a non-orientable manifold that has a non-zero Euler characteristic.