Arbeitsgruppe Geometrie, Topologie und Gruppentheorie

### Publications

1. Grundhöfer, Theo; Knarr, Norbert; Kramer, Linus.
Flag-homogeneous compact connected polygons. II.
Geom. Dedicata 83 (2000), no. 1-3, 1-29.
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It was recently (2011) discovered that there is a gap in a 1974 paper by Szenthe that we use. This gap has been now been closed in a paper by K.H. Hofmann and myself.

2. Bödi, Richard; Kramer, Linus.
On homomorphisms between generalized polygons.
Geom. Dedicata 58 (1995), no. 1, 1-14.
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The following result should have been included right after 3.5. It is an easy consequence of what we prove in the paper.
Proposition. Let $$\varphi$$ be an (abstract) homomorphism between topological polygons $$\mathfrak P$$ and $$\mathfrak P'$$. If the restriction of $$\varphi$$ to the point space is continuous, then $$\varphi$$ is continuous.

3. Grundhöfer, Theo; Knarr, Norbert; Kramer, Linus.
Flag-homogeneous compact connected polygons.
Geom. Dedicata 55 (1995), no. 1, 95-114.
pdf
It was recently (2011) discovered that there is a gap in Szenthe's 1974 paper [43, Thm.4]. This result is used in our paper. This gap has been now been closed in a paper by K.H. Hofmann and myself.

4. Kramer, Linus.
Compact polygons.
Dissertation, Math. Fak. Univ. Tübingen (1994), 72 pp.
arxiv:math/0104064
Errata.
Thm. 3.3.8 is not quite right: the point, line and flag space of a 5-dimensional compact hexagon may well be a product. The mistake occurs when I calculate with the Steenrod squares. This has no further consequences in the thesis.
It was recently (2011) discovered that there is a gap in Szenthe's 1974 paper [Sze, Thm.4]. This gap has been now been closed in a paper by K.H. Hofmann and myself.

5. Kramer, Peter; Kramer, Linus.
Diffraction and layer structure of a quasilattice.
Z. Naturforsch. 40 (1985), 1162-1163.
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