Oswald Veblen, American mathematician and academic (g. 1960)
Oswald Veblen (June 24, 1880 – August 10, 1960) was an American mathematician, geometer and topologist, whose work found application in atomic physics and the theory of relativity. He proved the Jordan curve theorem in 1905; while this was long considered the first rigorous proof of the theorem, many now also consider Camille Jordan's original proof rigorous.

1880Jun, 24
Oswald Veblen
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Events on 1880
- 13Feb
Edison effect
Thomas Edison observes the Edison effect. - 13May
Thomas Edison
In Menlo Park, New Jersey, Thomas Edison performs the first test of his electric railway. - 7Jun
Battle of Arica
War of the Pacific: The Battle of Arica, the assault and capture of Morro de Arica (Arica Cape), ends the Campaña del Desierto (Desert Campaign). - 28Jun
Ned Kelly
Australian bushranger Ned Kelly is captured at Glenrowan. - 11Nov
Ned Kelly
Australian bushranger Ned Kelly is hanged at Melbourne Gaol.