|Authors:||Siburg, Karl F.|
|Title:||Geometric proofs of the two-dimensional Borsuk-Ulam theorem|
|Abstract:||We give two proofs of the two-dimensional Borsuk-Ulam theorem. One is completely elementary and does not use homology theory or the mapping degree, while the second one makes use of the recent theory of symplectic quasi-states.|
|Appears in Collections:||Preprints der Fakultät für Mathematik|
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