Deaths on October 21

Wacław Sierpiński

Died on October 21, 1969

Wacław Sierpiński, Polish mathematician and academic (b. 1882)

Wacław Franciszek Sierpiński (Polish: [ˈvat͡swaf fraɲˈt͡ɕiʂɛk ɕɛrˈpij̃skʲi] (listen); 14 March 1882 – 21 October 1969) was a Polish mathematician. He was known for contributions to set theory (research on the axiom of choice and the continuum hypothesis), number theory, theory of functions and topology. He published over 700 papers and 50 books.

Three well-known fractals are named after him (the Sierpiński triangle, the Sierpiński carpet, and the Sierpiński curve), as are Sierpiński numbers and the associated Sierpiński problem.

References

Wacław Sierpiński

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Events on 1969

2 Mar

Concorde
In Toulouse, France, the first test flight of the Anglo-French Concorde is conducted.
17 Apr

Robert F. Kennedy
Sirhan Sirhan is convicted of assassinating Robert F. Kennedy.
16 Jul

Apollo 11
Apollo program: Apollo 11, the first mission to land astronauts on the Moon, is launched from the Kennedy Space Center at Cape Kennedy, Florida.
20 Jul

Apollo 11
Apollo program: Apollo 11's crew successfully makes the first manned landing on the Moon in the Sea of Tranquility. Americans Neil Armstrong and Buzz Aldrin became the first humans to walk on the Moon (July 21 UTC).
30 Jul

Richard Nixon
Vietnam War: US President Richard Nixon makes an unscheduled visit to South Vietnam and meets with President Nguyễn Văn Thiệu and U.S. military commanders.

Deaths on October 21

Wacław Sierpiński

Died on October 21, 1969

References

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Events on 1969

Concorde

Robert F. Kennedy

Apollo 11

Apollo 11

Richard Nixon