These are various notes

The initial quadratic form on an abelian group
This is a corrected version of an erroneous remark in our paper ``On the homotopy type of L-spectra of the integers''. The rest of the paper is not affected.
Erratum.pdf
PDF-Dokument [253.3 KB]

K-Theory seminar SS19
This is the program for this terms K-theory seminar about Galois descent in telescopically localized algebraic K-theory due to Clausen--Mathew--Naumann--Noel.
Galois descent.pdf
PDF-Dokument [196.2 KB]

K-Theory seminar WS 18/19
This is the detailed seminar program for our research seminar where we will go through the paper of Clausen--Mathew--Morrow about p-adic K-theory of p-adic rings.
CMM_seminar_programme.pdf
PDF-Dokument [219.4 KB]

Smooth and topological Normal Invariants of complex projective 2-space
I calculate the group of normal invariants of complex projective 2-space and use it to classify fake complex projective 3-spaces.
Normal invariants.pdf
PDF-Dokument [168.7 KB]

Homotopy 7-spheres
I use the classification of fake complex projective 3-spaces to calculate which of the 28 homotopy 7-spheres arises as an S^1-bundle over a fake complex projective 3-space.
homotopy 7-spheres.pdf
PDF-Dokument [213.6 KB]

Almost complex structures on 4-manifolds
This note aims to understand which topological 4-manifolds admit an almost complex structure.
almost complex 4 manifolds.pdf
PDF-Dokument [200.9 KB]

Poster Session BIGS 2015
My Poster for the annual poster session of the Bonn International Graduate School 2015
poster.pdf
PDF-Dokument [149.1 KB]

Poster Session BIGS 2014
My Poster for the annual poster session of the Bonn International Graduate School 2014
poster.pdf
PDF-Dokument [158.5 KB]

Poster Session BIGS 2013
My Poster for the annual poster session of the Bonn International Graduate School 2013
Poster BIGS 2013.pdf
PDF-Dokument [182.9 KB]