Jerzy Łoś

Jerzy Łoś c.1955

Jerzy Łoś (born March 22, 1920 in Lwów (now Lviv, Ukraine)-June 1, 1998 in Warsaw) (Polish pronunciation: [ˈjɛʐɨ ˈwɔɕ]) was a Polish mathematician, logician, economist, and philosopher. He is best known for his work on ultraproducts, in particular for "Łoś' 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 1996 Łoś suffered from a severe brain stroke. He was thenceforward ill until his death in 1998.

Selected publications

• Łoś, Jerzy (1955) Quelques remarques, théorèmes et problèmes sur les classes définissables d'algèbres. Mathematical interpretation of formal systems, pp. 98--113. North-Holland Publishing Co., Amsterdam.

See also

• Transfer principle

External links

• Jerzy Łoś's biography

Persondata
Name	Los, Jerzy
Alternative names
Short description
Date of birth	1920
Place of birth
Date of death	1998
Place of death