Jerzy Łoś, Date of Birth, Place of Birth, Date of Death

Jerzy Łoś

Polish mathematician

Date of Birth: 22-Mar-1920

Place of Birth: Lviv, Lviv Oblast, Ukraine

Date of Death: 01-Jun-1998

Profession: mathematician, economist, university teacher, philosopher

Nationality: Poland

Zodiac Sign: Aries

Jerzy Los (born March 22, 1920 in Lwów, Poland (now Lviv, Ukraine) – June 1, 1998 in Warsaw) (Polish pronunciation: ['j??? 'w??]) was a Polish mathematician, logician, economist, and philosopher.
He is especially known for his work in model theory, in particular for "Los's theorem", which states that any first-order formula is true in an ultraproduct if and only if it is true in "most" factors (see ultraproduct for details).
In model theory he also proved many preservation theorems, but he gave significant contributions, as well, to foundations of mathematics, Abelian group theory and universal algebra.
In the 60's he turned his attention to mathematical economics, focusing mainly on production processes and dynamic decision processes. He was faculty at academies in Wroclaw, Torun, and Warsaw. In 1996 Los suffered from a severe brain stroke.
He was thenceforward ill until his death in 1998.