Fake 4-ball
http://dbpedia.org/resource/Fake_4-ball
In mathematics, a fake 4-ball is a compact contractible topological 4-manifold. Michael Freedman proved that every three-dimensional homology sphere bounds a fake 4-ball. His construction involves the use of Casson handles and so does not work in the smooth category.
rdf:langString
rdf:langString
Fake 4-ball
xsd:integer
18669800
xsd:integer
1070713914
rdf:langString
In mathematics, a fake 4-ball is a compact contractible topological 4-manifold. Michael Freedman proved that every three-dimensional homology sphere bounds a fake 4-ball. His construction involves the use of Casson handles and so does not work in the smooth category.
xsd:nonNegativeInteger
621