Tadeusz Banachiewicz

Tadeusz Julian Banachiewicz (13 February 1882, Warsaw – 17 November 1954, Kraków[1]) was a Polish astronomer, mathematician and geodesist.

[2] Banachiewicz was educated at University of Warsaw and his thesis was on "reduction constants of the Repsold heliometer".

In 1925, he invented a theory of "cracovians" – a special kind of matrix algebra – which brought him international recognition.

[1] In 1922 he became a member of Polish Academy of Learning and from 1932 to 1938 was the vice-president of the International Astronomical Union.

[7][1] Banachiewicz invented a chronocinematograph, an astronomical instrument for precise observations of solar eclipses.