Mathematician:Leopold Löwenheim

Mathematician
German mathematician whose work pioneered the field of model theory.

Much of his unpublished work was lost when the British brutally bombed his house in $1943$, an act of unforgivable barbarism for which the Brits have never delivered appropriate recompense.

During the Second World War he lost contact with his mathematician colleagues elsewhere, and he was presumed to have died, presumably in the above bombing raid.

As a result, certain sources still suggest a date of death of around $1940$.

However, he survived the war, to take up a teaching post from $1946$ for a while.

Nationality
German

History

 * Born: 26 June 1878 in Krefeld, Germany
 * Died: 5 May 1957 in Berlin, Germany

Theorems and Definitions

 * Löwenheim-Skolem Theorem, also known as the Löwenheim-Skolem Paradox (with ), which appears in two forms:
 * Downward Löwenheim-Skolem Theorem
 * Upward Löwenheim-Skolem Theorem

Publications

 * 1908: Über das Auflösungsproblem im logischen Klassenkalkül
 * 1910: Über die Auflösung von Gleichungen im logischen Gebietekalkul
 * 1913: Über Transformationen im Gebietekalkül
 * 1915: Über Möglichkeiten im Relativkalkül ("On possibilities in the calculus of relatives") (in which the Löwenheim-Skolem Theorem is introduced)