Neuer Beweis des Vorhandenseins complexer Wurzeln in einer algebraischen Gleichung. Von Hermann Kinkelin in Basel
Noncyclic Division Algebras.
Norms in Quadratic Fields and Their Relations to Non Commuting 2x2 Matrices I.
Note on a variation of the Schröder-Bernstein problem for fields
In this note we study fields with the property that the simple transcendental extension of is isomorphic to some subfield of but not isomorphic to . Such a field provides one type of solution of the Schröder-Bernstein problem for fields.