Short Notes

Combing a hedgehog over ℚ₂
[note (2024)]
(see Remark 1.10 of Alexey Ananyevskiy, Marc Levine: Combing a hedgehog over a field)
A note about incidence matrices of projective planes
[note (2024)]
Alternativer Beweis des Satzes von Cavachi
[note (2022)]
(see Marius Cavachi: On a special case of Hilbert's irreducibility theorem)
Common eigenvector of commuting pair of endomorphisms
[note (2021)]
A remark on the sum of squares law
[note (2017)]
Turnwald’s proof of Wan’s value set bound
[note (2017)]
Irreducibility of Xⁿ − X − 1
[note (2015)]
A note on primitive groups containing a 3–cycle
[note (2013)]
Simple lower bound of Euler's totient function
[note (2011)]
A note on Morse polynomials
[note (2011)]
Simple algebras, Skolem–Noether, ...
[note (2010)]
On products of transpositions
[note (2005)]
The degree 8 examples in Davenport's problem
[note (2006)]
Value sets of polynomials on Hilbertian fields
[note (2005)]
Nicht-Torsion in abelschen Varietäten
[note (2004)]