A new algebraic criterion for shellability.
Still another proof of the existence of Sylow--subgroups.
On lifting prime ideals.
A simple, (almost) non-inductive proof for the existence of composite fields and algebraic closures.
The Tutte group of projective spaces.
On counting of periodic words. (Zur Abzählung periodischer Worte.)
On zero-testing and interpolation of sums of characters.
On the integrality of the Witt polynomials.
The tree of life and other affine buildings.
The cyclotomic identity and the cyclic group.
Valuated matroids---a new look at the greedy algorithm.
T-theory.
Metrische Ebenen und projektive Homomorphismen.
Vertices of Integral Representations.
A Characterisation of Solvable Groups.
Der p-adische Abschluß metrischer Ebenen.
Zur Theorie der Henselschen Ringe.
An Intertwining Number Theorem for Integral Representations and Applications.
Metrische Ebenen über quadratisch perfekten Körpern.
On the algebraic structure of the character ring of a compact connencted Lie Group.
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