Ein topologischer Beitrag zur reellen Algebra

DOI10.1007/BF01378062zbMath0024.36002MaRDI QIDQ2646897

Heinz Hopf

Publication date: 1941

Published in: Commentarii Mathematici Helvetici (Search for Journal in Brave)

Full work available at URL: https://eudml.org/doc/138770

zbMATH Keywords

Topology

Mathematics Subject Classification ID

General topology (54-XX) Manifolds and cell complexes (57-XX)

Related Items (21)

On Sums of Generating Sets in ℤ₂ⁿ ⋮ Fibrés vectoriels spéciaux ⋮ The double sign of a real division algebra of finite dimension greater than one ⋮ Etale homotopy and sums-of-squares formulas ⋮ Equivariant Vector Fields on Spheres ⋮ Generalization of the Hopf commutative theorem ⋮ Spaces of embeddings: Nonsingular bilinear maps, chirality, and their generalizations ⋮ On the immersion problem for real projective spaces ⋮ Real quadratic division algebras ⋮ CLASSIFICATION, AUTOMORPHISM GROUPS AND CATEGORICAL STRUCTURE OF THE TWO-DIMENSIONAL REAL DIVISION ALGEBRAS ⋮ Nonsingular bilinear maps revisited ⋮ Quadratic forms between spheres and the non-existence of sums of squares formulae ⋮ Classification of Some Graded not Necessarily Associative Division Algebras I ⋮ Clifford matrices and a problem of hurwitz ⋮ Structure and representation of nonassociative algebras ⋮ A historical perspective of the theory of isotopisms ⋮ Zur Klassifikation Vierdimensionaler Reeller Divisionsalgebren ⋮ Circles and quadratic maps between spheres ⋮ Some new results on composition of quadratic forms ⋮ Vom Fundamentalsatz der Algebra zum Satz von Gelfand-Mazur ⋮ Quadratic division algebras revisited (Remarks on an article by J. M. Osborn)

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