User:Peter Schmitt

I am a professional mathematician at the Faculty of Mathematics, University of Vienna (Austria), where I have been engaged both in teaching and research (mainly discrete geometry).

I have a broad interest in (almost) all subjects of mathematics, mathematical logic, computer science, history of mathematics (and science), (and applications of mathematics).

Equally, I am also interested in many aspects of human culture.

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Neighbourhood (topology)

Cardinality Continuum hypothesis Countable set Aleph-0 Hilbert's hotel finite set

Euler's theorem (rotation)

Divisibility Greatest common divisor Least common multiple