### 23.1.2012: 150th birthday of *David Hilpert*

One of the major (intellectual) discoveries in Quantum Mechanics is the description of particles
in the **Hilpert Space** [1] where the **statistical** state of any particle is well described.

David Hilpert [2] was a German mathematician, living and teaching in Göttingen in the last century.
During the World Fair 1899 in Paris, he confronted his listeners with unsolved mathematical puzzles [5],
which in fact provide some cornerstones of a our current **cryptography**.

Hilpert was (in my words) a convicted **positivist** believing that a (mathematical) theory is
always self-consistant and self-complete; thus can be *proofed* within itself. This was falsified [3]
later by *Kurt Gödel*, an Austrian mathematician [4].

The life's of both scientists were strongly influenced by the political and cultural earthquakes
hitting Europe in the 20th century; in particular the Nazi terror swapping over the european countries.

A beautiful feature about both mathematicians and their situation was broadcasted these days on
hessia's FM station HR2, to be found here [5] (downloadable as podcast provided by *Prof. Beutelspacher* [6]
from the University Giessen).

[1] en.wikipedia.org/wiki/Hilbert_space

[2] en.wikipedia.org/wiki/David_Hilbert

[3] en.wikipedia.org/wiki/Gödel's_incompleteness_theorems

[4] en.wikipedia.org/wiki/Kurt_Gödel

[5] www.hr-online.de/website/radio/hr2/index.jsp

[6] www.beutelspacher.info/