1

Hjelmslev-Gruppen über lokalen ringen

Heike Benda, Frieder Knüppel
Journal:
Geometriae Dedicata
Year:
1976
Language:
german
File:
PDF, 484 KB
german, 1976
2

Reguläre Hjelmslev-Homomorphismen

Frieder Knüppel, Michael Kunze
Journal:
Geometriae Dedicata
Year:
1981
Language:
german
File:
PDF, 1.27 MB
german, 1981
3

Construction of Symmetric and Symplectic Bilinear Forms

Frieder Knüppel
Journal:
Geometriae Dedicata
Year:
1999
Language:
english
File:
PDF, 83 KB
english, 1999
4

Lotketten in Speziellen Hjelmslev-Gruppen

Frieder Knüppel
Journal:
Journal of Geometry
Year:
1978
Language:
german
File:
PDF, 567 KB
german, 1978
6

Products of similar matrices

Frieder Knüppel
Journal:
Linear Algebra and its Applications
Year:
1996
Language:
english
File:
PDF, 554 KB
english, 1996
7

The extended covering number of SLn is n + 1

Frieder Knüppel, Klaus Nielsen
Journal:
Linear Algebra and its Applications
Year:
2006
Language:
english
File:
PDF, 259 KB
english, 2006
10

The product of two quadratic matrices

Florian Bünger, Frieder Knüppel, Klaus Nielsen
Journal:
Linear Algebra and its Applications
Year:
2001
Language:
english
File:
PDF, 110 KB
english, 2001
11

k-fold anti-invariant subspaces of a linear mapping

Frieder Knüppel, Klaus Nielsen
Journal:
Linear Algebra and its Applications
Year:
2003
Language:
english
File:
PDF, 173 KB
english, 2003
12

Products of symmetries in unitary groups

Florian Bünger, Frieder Knüppel, Klaus Nielsen
Journal:
Linear Algebra and its Applications
Year:
1997
Language:
english
File:
PDF, 1.90 MB
english, 1997
13

Verallgemeinerts Lotschnittaxiom

Friedrich Bachmann, Frieder Knüppel
Journal:
Mathematische Zeitschrift
Year:
1977
Language:
german
File:
PDF, 758 KB
german, 1977
14

Products of Involutions in O + (V)

Frieder Knüppel, Klaus Nielsen
Journal:
Linear Algebra and its Applications
Year:
1987
Language:
english
File:
PDF, 400 KB
english, 1987
15

Products of Quasi-Involutions in Unitary Groups

FLORIAN BÜNGER, FRIEDER KNÜPPEL
Journal:
Geometriae Dedicata
Year:
1997
Language:
english
File:
PDF, 113 KB
english, 1997
16

Regular homomorphisms of generalized projective planes

Frieder Knüppel
Journal:
Journal of Geometry
Year:
1987
Language:
english
File:
PDF, 502 KB
english, 1987
17

Starrheit in der Geometrie involutorischer Gruppenelemente

Friedrich Bachmann, Frieder Knüppel
Journal:
Archiv der Mathematik
Year:
1980
Language:
german
File:
PDF, 465 KB
german, 1980
18

Lotketten in metrischen Ebenen

Frieder Knüppel
Journal:
Journal of Geometry
Year:
1977
Language:
german
File:
PDF, 884 KB
german, 1977
20

Annotations.

Knüppel, Frieder, Nielsen, Klaus
Journal:
The Lancet
Year:
1882
Language:
english
File:
PDF, 1.21 MB
english, 1882
21

Covering and products of blockcyclic matrices

Knüppel, Frieder, Nielsen, Klaus
Journal:
Linear Algebra and its Applications
Year:
2013
Language:
english
File:
PDF, 307 KB
english, 2013
22

Covering singular linear semi-groups

Knüppel, Frieder, Nielsen, Klaus
Journal:
Linear Algebra and its Applications
Year:
2013
Language:
english
File:
PDF, 347 KB
english, 2013
24

Transversals in plane hyperbolic geometry

Knüppel, Frieder
Journal:
Journal of Geometry
Year:
2014
Language:
english
File:
PDF, 236 KB
english, 2014
25

Projective Planes Over Rings

Frieder Knüppel
Journal:
Results in Mathematics
Year:
1987
Language:
english
File:
PDF, 737 KB
english, 1987
26

The length-problem for Eichler-transformations

Knüppel, Frieder
Journal:
Forum Mathematicum
Year:
1998
Language:
english
File:
PDF, 162 KB
english, 1998
27

Products of simple isometries of given conjugacy types

Knüppel, Frieder
Journal:
Forum Mathematicum
Year:
1993
Language:
english
File:
PDF, 1.97 MB
english, 1993