Mathematics

When and why is it okay to treat differentials as fractions? (German)

How to solve inequalities (German)

Sieve of Eratosthenes for MS-DOS (Assembler)

Lecture notes for Analysis I (German)
Lecture notes for Analysis II (German)

Finite groups of orthogonal transformations in three-dimensional real vector spaces (German)

“The only way to learn mathematics is to do mathematics.” — Paul Halmos